Answers
Answer:
1) x = 6.6.
2) x = 6.1.
Step-by-step explanation:
1) In this triangle, the hypotenuse is given, which is 8 units, and the angle is given, which is 35 degrees. The base is unknown. To find the base, following ratio will be used:
cos θ = Base/Hypotenuse.
cos 35 = x/8.
x = 8*cos 35.
x = 6.6 units (to the nearest tenth)!!!
2) In this triangle, the base is given by 12, and the angle is given by 27 degrees. The perpendicular is unknown. To find the perpendicular in this case, tangent formula will be used:
tan θ = Perpendicular/Base
tan 27 = x/12.
x = 12*tan 27.
x = 6.1 units (to the nearest tenth)!!!
Answer:
1). x = 6.55 units
2).x = 2.55 units
Step-by-step explanation:
1). To find the value of x
From the given figure 1 we can see a right angled triangle with hypotenuse is 8 units
Cos 35 = Adjacent side/Hypotenuse
= x/8
x = 8 * Cos 35
= 8 * 0.8196
= 6.55
2). To find the value of x
From the figure we can write,
Tan 27 = Opposite side/Adjacent side
= x/12
x = 12 * Tan 27
= 12 * 0.509
= 2.55 units
Related Questions
The heights of a group of boys and girls at a local middle school are shown on the dot plots below.
When comparing the shapes of the two sets of data, what conclusion can someone draw?
A) The shortest boy is taller than the shortest girl.
B) The range for the girls is greater than the range for the boys.
C) There is an outlier in the data for the boys, but not for the girls.
D) The girls are generally taller than the boys.
Answers
Answer:
The most appropriate answer option is D) The girls are generally taller than the boys.
Step-by-step explanation:
A) The shortest boy is taller than the shortest girl:
The shortest guy is not taller than the girl so its false.
B) The range for the girls is greater than the range for the boys:
Range for girls = 56 - 44 = 12
Range for boys = 54 - 41 = 13
C) There is an outlier in the data for the boys, but not for the girls:
It is present in both.
D) The girls are generally taller than the boys:
Average height of boys = [tex]\frac{(41)+(44\times3)+(46\times3)+(48\times2)+(50\times3)+(52\times)+(54\times4)}{20}[/tex] = 49.05
Average height of girls = [tex]\frac{(44\times2)+(46\times2)+(48)+(50\times3)+(52\times4)+(54\times3)+(56\times4)}{20}[/tex] = 50.9
Therefore, the correct answer option is D) The girls are generally taller than the boys.
Answer:
D) The girls are generally taller than the boys.
Step-by-step explanation:
The heights of a group of boys and girls at a local middle school are shown on the dot plots. When comparing the shapes of the two sets of data, the girls are generally taller than the boys.
DOES ANYONE KNOW HOW TO DO THIS??????????
Donna's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Donna $4.20 per pound, and type B coffee costs $5.30 per pound. This month, Donna made 145 pounds of the blend, for a total cost of $659.90. How many pounds of type B coffee did she use?
Answers
Answer:
She used 49 of type B
Step-by-step explanation:
4.20 x 96 = 403.25.3 x 49 = 259.7403.2 + 259.7 = 659.9Step-by-step explanation:
Same steps, different problem.
x - pounds of type A coffee for current month
y - pounds of type B coffee for current month
x+y=145
4.2x+5.3y=659.9
x+y=145 -> multiply both sides by 4.2
4.2x+5.3y=659.9
4.2x+4.2y=609
1.1y=50.9
Find the value of x. Then find the measure of each labeled angle.
Answers
Answer:
20
4x will be 80
5x will be 100
Step-by-step explanation:
So those two how pink arrows means those opposite sides are parallel.
The side at the bottom is acting as a transversal through the parallel lines.
The angle that has measurement 5x and the one that has 4x are actually same-side interior angles; some people like to call it consecutive angles.
These angles add up to be 180 degrees when dealing with parallel lines.
So we have 5x+4x=180
which means 9x=180
Divide both sides by 9 giving us x=180/9
x=180/9=20.
The angle labeled 4x will then be 4(20) which is 80.
The angle labeled 5x will then by 5(20) which is 100.
To solve for x in vector problems, identify the axes, decompose each vector into its components using trigonometric functions, combine the components to find the resultant vector, and ensure that the solution is reasonable. Be sure to use radians for angles in calculations.
Explanation:To find the value of x, we need to follow specific steps when dealing with vectors and their components. The given information suggests we have vectors A and B with specific magnitudes and angles relative to the x-axis. Here's how to proceed:
Identify the x- and y-axes that will be used in the problem.Find the components of each vector to be added along the perpendicular axes using the equations: Ax = A cos θ and Ay = A sin θ, where A is the magnitude of vector A and θ is the angle it makes with the x-axis. Repeat this for vector B to obtain Bx and By.Substitute the known values into the equations and solve for the components.Combine the x-components (Ax and Bx) and y-components (Ay and By) to find the resultant vector's components.To get the resultant vector's magnitude, use the Pythagorean theorem.To get the direction of the resultant, measure the angle it makes with the reference frame or use trigonometric relationships to determine this angle.Check your answer to see if it is reasonable, ensuring the units and the magnitude of the resultant make sense.For example, given A = 53.0 m, θA = 20.0°, B = 34.0 m, and θB = 63.0°, we can find the x-components as Ax = A cos θA. It is important to use radians when calculations involve angles.
Learn more about Vector Decomposition here:https://brainly.com/question/24550128
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Translate the given statement into propositional logic using proposition provided :
You can see the movie only if you are over 18 years old or you have the permission of a parent. Express your answer in terms of m: “You can see the movie,” e: “You are over 18 years old,” and p: “You have the permission of a parent.”
Answers
Final answer:
In propositional logic, the statement translates to ‘m → (e ∨ p)’, which denotes that seeing the movie 'm' can happen if the person is over 18 'e' or has parental permission 'p'.
Explanation:
The student is asking to translate a given statement into propositional logic. The statement in question is "You can see the movie only if you are over 18 years old or you have the permission of a parent." Using the propositions provided, where m represents "You can see the movie," e represents "You are over 18 years old," and p represents "You have the permission of a parent," we can express the logical relation in the following way:
In terms of logic, the statement can be written as a conditional: if you can see the movie (m), then you are over 18 years old (e) or you have the permission of a parent (p). This can be expressed as:
m → (e ∨ p)
This states that seeing the movie is the consequence of the condition of being over 18 years old or having parental permission. The conditional statement here establishes a necessary and sufficient relationship, while the use of or indicates that at least one of the conditions (being over 18 or having permission) must be met for the consequence (seeing the movie) to be true.
Find the area of the circle.
Use 3.14 for t.
Help Resources
d = 4 m
A = [?] m2
A=Tr2
Answers
Answer:
The area of the circle is A = 12.56 m²
Step-by-step explanation:
* Lets explain how to solve the problem
- The area of any circle is A = π r² , where r is the radius of the circle
- In any circle the length of the radius is half the length of its diameter
* Lets solve the problem
- The diameter of the circle is 4 meters
∵ The radius of the circle = 1/2 diameter
∵ The diameter = 4 meters
∴ The radius = 1/2 × 4 = 2 meters
- The area of the circle is A = π r²
∵ The value of π = 3.14
∵ The length of r = 2 meters
- Substitute the value of r in the rule of the area
∵ A = π r²
∴ A = 3.14 × (2)²
∴ A = 3.14 × 4 = 12.56 meters²
* The area of the circle is A = 12.56 m²
Determine the x- and y- intercepts for the graph defined by the given equation.
y = 7x + 3
Answers
Answer:
intercept is 3
X intercept is -3/7
For this case we have the following equation:
[tex]y = 7x + 3[/tex]
To find the y-intersection values we do [tex]x = 0[/tex]:
[tex]y = 7 (0) +3\\y = 0 + 3\\y = 3[/tex]
To find the x-intersection values we do[tex]y = 0[/tex]
[tex]0 = 7x + 3[/tex]
Subtracting 3 on both sides:
[tex]-3 = 7x[/tex]
Dividing between 7 on both sides:
[tex]x = - \frac {3} {7}[/tex]
So, we have:
x-intersection: [tex](- \frac {3} {7}, 0)[/tex]
y-intersection: [tex](0,3)[/tex]
Answer:
Option B
ASAP someone please help me out please
Answers
Answer:
0
Step-by-step explanation:
If you think in degrees easier than in radians, then make this conversion.
pi = 180 degrees
(3/2)*pi = (3/2) * 180 = 180 * 3/2 = 270
Sin(270) = -1
cos(270) = 0
==========
sin(270) * cos(270) = -1 * 0 = 0
Suppose the circumference of a crop circle is 150.7968 hectometers (hm). What's the radius of the circle? (Use π = 3.1416.)
A. 24 hm
B. 96 hm
C. 48 hm
D. 16 hm
Answers
Answer:
A. 24 hm
Step-by-step explanation:
The formula for the circumference of a circle is ...
C = 2πr
Fill in the given values and solve.
150.7968 hm = 2×3.1416×r
(150.7968 hm)/6.2832 = r = 24 hm . . . . . divide by 2π
The radius of the circle is 24 hm.
Which statements describe a parallelogram that must be a rhombus? parallelogram with four congruent sides parallelogram with opposite sides parallel parallelogram with four congruent angles parallelogram with diagonal that bisects an angle parallelogram with diagonals that bisect each other
Answers
Answer:
The correct option is 1.
Step-by-step explanation:
Rhombus is a special case of parallelogram.
The properties of a parallelogram and rhombus:
1. Opposite sides parallel and equal.
2. Diagonals bisect each other.
3. Opposite angles are congruent.
The consecutive sides of a parallelogram may or may not be equal. But a rhombus has four congruent sides.
If a parallelogram has four congruent sides, then that parallelogram is known as rhombus.
The required statement that describe a parallelogram must be a rhombus is "parallelogram with four congruent sides ".
Therefore the correct option is 1.
Answer:
This is what i got
A person has a rectangular board 12 inches by 16 inches around which she wants to put a uniform border of shells. If she has enough shells for a border whose area is 380 square inches, determine the width of the border.
Answers
Answer:
so width of border is 10 inches
Step-by-step explanation:
Given data
board size = 12 * 16 inches
border area = 380 square inches
to find out
width of border
solution
let us assume width of border is x
first we find area of board i.e. 12 × 16 = 192 sq inches
and border area is given = 380 square inches
so total area of border and board is 192 + 380 = 572 sq inches
so we can say ( x+ 12 ) (x +16 ) = 572
solve this equation we get
x² +16x + 12x + 192 = 572
x² + 28x + 192 = 572
x² + 28x - 380 = 0
solve this equation and we get two value of x i.e.
x = 10 and x = -38
we will consider positive value here
so width of border is 10 inches
Answer:
The width of the border is 5 inches.
Step-by-step explanation:
Let x be the width of the border,
Given,
The rectangular board has the dimension 12 inches by 16 inches,
Thus, the dimension of the figure by joining the border with the board is,
(12+2x) inches by (16+2x) inches,
= (12+2x)(16+2x)
Hence, the area of the border = area of the figure by joining the border with the board - area of the board
= (12+2x)(16+2x) - 12 × 16
According to the question,
The area of the border = 380 square inches,
[tex](12+2x)(16+2x) - 12\times 16=380[/tex]
[tex]192+24x+32x+4x^2-192=380[/tex]
[tex]4x^2+56x-380=0[/tex]
[tex]4x^2+76x-20x-380=0[/tex]
[tex]4x(x+19)-20(x+19)=0[/tex]
[tex](4x-20)(x+19)=0[/tex]
By zero product property,
[tex]x=5\text{ or }x=-19[/tex]
Since, width can not be negative,
Hence, the width of the border is 5 inches.
Identify the polygon with vertices A(5,0), B(2,4), C(−2,1), and D(1,−3), and then find the perimeter and area of the polygon. HELP ASAP!
Answers
Answer:
Part 1) The polygon is a square
Part 2) The perimeter is equal to [tex]20\ units[/tex]
Part 3) The area is equal to [tex]25\ units^{2}[/tex]
Step-by-step explanation:
we have
[tex]A(5,0), B(2,4), C(-2,1),D(1,-3)[/tex]
Plot the points
see the attached figure
we know that
the formula to calculate the distance between two points is equal to
[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]
Find the distance AB
[tex]A(5,0),B(2,4)[/tex]
substitute in the formula
[tex]d=\sqrt{(4-0)^{2}+(2-5)^{2}}[/tex]
[tex]d=\sqrt{(4)^{2}+(-3)^{2}}[/tex]
[tex]d=\sqrt{25}[/tex]
[tex]AB=5\ units[/tex]
Find the distance BC
[tex]B(2,4), C(-2,1)[/tex]
substitute in the formula
[tex]d=\sqrt{(1-4)^{2}+(-2-2)^{2}}[/tex]
[tex]d=\sqrt{(-3)^{2}+(-4)^{2}}[/tex]
[tex]d=\sqrt{25}[/tex]
[tex]BC=5\ units[/tex]
Find the distance CD
[tex]C(-2,1),D(1,-3)[/tex]
substitute in the formula
[tex]d=\sqrt{(-3-1)^{2}+(1+2)^{2}}[/tex]
[tex]d=\sqrt{(-4)^{2}+(3)^{2}}[/tex]
[tex]d=\sqrt{25}[/tex]
[tex]CD=5\ units[/tex]
Find the distance AD
[tex]A(5,0),D(1,-3)[/tex]
substitute in the formula
[tex]d=\sqrt{(-3-0)^{2}+(1-5)^{2}}[/tex]
[tex]d=\sqrt{(-3)^{2}+(-4)^{2}}[/tex]
[tex]d=\sqrt{25}[/tex]
[tex]AD=5\ units[/tex]
we have that
AB=BC=CD=AD
Find the distance BD (diagonal)
[tex]B(2,4),D(1,-3)[/tex]
substitute in the formula
[tex]d=\sqrt{(-3-4)^{2}+(1-2)^{2}}[/tex]
[tex]d=\sqrt{(-7)^{2}+(-1)^{2}}[/tex]
[tex]BD=\sqrt{50}\ units[/tex]
Verify if the polygon is a square
If the triangle BDA is a right triangle, then the polygon is a square
Applying the Pythagoras theorem
[tex]BD^{2}=AD^{2}+AB^{2}[/tex]
substitute
[tex](\sqrt{50})^{2}=5^{2}+5^{2}[/tex]
[tex]50=50[/tex] -----> is true
so
The triangle BDA is a right triangle
therefore
The polygon is a square
Find the Area of the polygon
The area of a square is equal to
[tex]A=b^{2}[/tex]
we have
[tex]b=5\ units[/tex]
[tex]A=5^{2}=25\ units^{2}[/tex]
Find the perimeter of the polygon
The perimeter of a square is equal to
[tex]P=4b[/tex]
we have
[tex]b=5\ units[/tex]
[tex]P=4(5)=20\ units[/tex]
Use the distributive property to solve the equation 3x=15?
Answers
Answer:
x = 5
Step-by-step explanation:
Ordinarily, one would not need the distributive property to solve this equation. It is quickly and easily solved by making use of the multiplication property of equality: multiply both sides of the equation by 1/3.
3x(1/3) = 15(1/3)
x = 5
___
To use the distributive property, we need the sum of two terms that have a common factor. We can get that form by subtracting 15 from both sides of the equation (subtraction property of equality):
3x - 15 = 15 - 15 . . . . subtract 15
3x -15 = 0 . . . . . . . . .simplify
Now, we can apply the distributive property to remove a factor of 3:
3(x -5) = 0
And we can use the multiplication property of equality to multiply by 1/3:
3(1/3)(x -5) = 0(1/3)
x -5 = 0 . . . . . . . . . . simplify
Finally, we can add 5 to both sides of the equation (addition property of equality):
x -5 +5 = 0 +5
x + 0 = 5 . . . . . . simplify
x = 5 . . . . . . . . . .simplify more
Answer:
X=5
Step-by-step explanation:
i believe this is the correct answer!
If it took Carlos an hour to cycle from his house to the library yesterday, was the distance that he cycled greater than 6 miles? (Note: 1 mile = 5,280 feet)
(1) The average speed at which Carlos cycled from his house to the library yesterday was greater than 16 feet per second.
(2) The average speed at which Carlos cycled from his house to the library yesterday was less than 18 feet per second.
Answers
Answer:
Option 2 is the correct answer.
Step-by-step explanation:
We know that
[tex]Speed=\frac{Distance}{time}[/tex]
We have 1 mile = 5280 feet thus 6 miles = 31680 feet
Similarly 1 hour = 3600 seconds
Applying values in the equation above we get
[tex]Speed=\frac{31680feet}{3600sec}\\\\Speed=8.8feet/sec[/tex]
Thus his average speed is less than 18feet/sec
A cone's height is equal to the radius of its base. The area of its base is 1,386 square units. The approximate radius of the cone's base is____ units. The approximate volume of the cone is ____cubic units. Use . Pie= 22/7
Answers
Answer:
21 units9702 units³Step-by-step explanation:
The area of the base is given by the formula ...
A = πr²
so the radius is ...
r = √(A/π) = √(1386/(22/7)) = √441 = 21 . . . units
__
The volume is given by ...
V = (1/3)Bh
where B is the area of the base, and h is the height (equal to the radius). Filling in the numbers, we have ...
V = (1/3)(1386)(21) = 9702 . . . . cubic units
What is tan 11pie/6 ?
Answers
Answer:
1/root 3
Step-by-step explanation:
pi =180degrees
11×180/6
11×30
330
tan 330=tan (360-30)
=-tan30
=1/root3
i have answered ur question
Easy Points if you know math. Please help, question attached in picture.
Answers
Answer:
y = 1/2x +6
Step-by-step explanation:
We have a point and a slope. Therefore we can use the point slope form to create a line
y-y1 = m(x-x1)
y-5 = 1/2(x--2)
y-5 = 1/2(x+2)
Distribute the 1/2
y-5 = 1/2x +1
Add 5 to each side
y-5+5 = 1/2x +1+5
y = 1/2x +6
This is in slope intercept form
The graph below shows a system of equations: y = -x + 5 and y = x - 1.
The x-coordinate of the solution to the system of equations is __________. Answer for Blank 1:
Answers
Answer:
3
Step-by-step explanation:
I don't see the graph.
So I'm going to do algebra and should be x-coordinate of the intersection you see in front of you.
If y=-x+5 and y=x-1, then -x+5=x-1.
-x+5=x-1
Add x on both sides:
5=2x-1
Add 1 on both sides:
6=2x
Divide 2 on both sides:
6/2=x
Simplify
3=x
You should see them cross when x is 3.
The y there should by 3-1=2.
They should cross at the ordered pair (3,2).
Answer:
3
Step-by-step explanation:
If a graph shows a system of equations: y = -x + 5 and y = x - 1, the x-coordinate of the solution to the system of equations is 3.
y=-x+5
y=x-1
-x+5=x-1
Can someone help me with this math question it involves transformation
Answers
Answer:
ABCD is reflected over the y-axis and translate (x + [-4] , y + [-4])
Step-by-step explanation:
* Lets explain the reflection and the translation
- If point (x , y) reflected across the x-axis
∴ Its image is (x , -y)
- If point (x , y) reflected across the y-axis
∴ Its image is (-x , y)
- If the point (x , y) translated horizontally to the right by h units
∴ Its image is (x + h , y)
- If the point (x , y) translated horizontally to the left by h units
∴ Its image is (x - h , y)
- If the point (x , y) translated vertically up by k units
∴ Its image is (x , y + k)
- If the point (x , y) translated vertically down by k units
∴ Its image is (x , y - k)
* Now lets solve the problem
∵ The vertices of ABCD are:
A = (-5 , 2) , B = (-3 , 4) , C = (-2 , 4) , D = (-1 , 2)
- If ABCD reflected over the y-axis we will change the sign of the
x-coordinate of all the points
∴ The image of A = (5 , 2)
∴ The image of B = (3 , 4)
∴ The image of C = (2 , 4)
∴ The image of D = (1 , 2)
∴ The image of ABCD after reflection over the y-axis will be at
the first quadrant
- The figure EHGF is left and down the image of ABCD after
the reflection over the y-axis
∴ The image is translate to the left and down
∵ E = (1 , -2) and E is the image of A after reflection and translation
∵ The image of a after reflection is (5 , 2)
- That means 5 became 1 and 2 became -2
∵ 1 - 5 = -4
∴ The image of A after reflection translate 4 units to the left
∵ -2 - 2 = -4
∴ The image of A after reflection translate 4 units down
∴ ABCD is reflected over the y-axis and translate (x + [-4] , y + [-4])
* You can check the rest of points
# B with H
∵ B = (-3 , 4) after reflection over y-axis is (3 , 4) after translation is
(3 + [-4] , 4 + [-4]) = (-1 , 0) the same with point H = (-1 , 0)
# C with G
∵ C = (-2 , 4) after reflection over y-axis is (2 , 4) after translation is
(2 + [-4] , 4 + [-4]) = (-2 , 0) the same with point G = (-2 , 0)
# D with F
∵ D = (-1 , 2) after reflection over y-axis is (1 , 2) after translation is
(1 + [-4] , 2 + [-4]) = (-3 , -2) the same with point F = (-3 , -2)
Certainly! In order to assist you effectively with your math question involving transformation, please provide me with the specific details or instructions regarding the transformation problem you're facing.
Are you looking to translate, rotate, reflect, or dilate a geometric figure? Please provide the specifics such as the type of transformation, the figure involved, and any parameters (like the direction and distance of a translation, the angle and direction of a rotation, the line of reflection, or the scale factor and center of dilation for a dilation).
Once you provide these details, I'll be able to guide you through the mathematical process to solve your transformation problem step by step.
Need help with this
Answers
Answer:
Answer choice C is the correct answer.
Step-by-step explanation:
Answer choice A, 4/9, is equal to roughly .44.
Answer choice B, 2/5, is equal to exactly .4.
Answer choice C, 3/6, is equal to exactly .5.
Answer choice D, 5/12, is equal to roughly .42.
A proportion implies that the fractions will equal each other in value. The fraction 7/14 is equal to 1/2 or .5. Answer choice C, when simplified, is equal to 1/2 or .5, making it the correct answer.
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 92.6-cm and a standard deviation of 2-cm. For shipment, 12 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is between 92-cm and 92.4-cm. Enter your answer as a number accurate to 4 decimal places.
Answers
Answer: 0.2140
Step-by-step explanation:
Given : A company produces steel rods. The lengths of the steel rods are normally distributed with
[tex]\mu=92.6 \text{ cm}[/tex]
[tex]\sigma=2\text{ cm}[/tex]
Sample size : [tex]n=12[/tex]
Let x be the length of randomly selected item.
z-score : [tex]z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}[/tex]
For x=92 cm
[tex]z=\dfrac{92-92.6}{\dfrac{2}{\sqrt{12}}}\approx-1.04[/tex]
For x=92.4 cm
[tex]z=\dfrac{92.4-92.6}{\dfrac{2}{\sqrt{12}}}\approx-0.35[/tex]
The probability that the average length of a randomly selected bundle of steel rods is between 92-cm and 92.4-cm by using the standard normal distribution table
= [tex]P(92<x<92.4)=P(-1.04<z<-0.35)=P(z<-0.35)-P(z<-1.04)[/tex]
[tex]= 0.3631693-0.14917=0.2139993\approx0.2140[/tex]
Hence, the probability that the average length of a randomly selected bundle of steel rods is between 92-cm and 92.4-cm is 0.2140.
Please help with this question
Answers
Explanation:
1. Sine and Cosine are never greater than 1 because they are the ratio of the leg of a right triangle to the hypotenuse. The hypotenuse is never shorter than one of the legs of a right triangle, so the ratio is at most 1.
__
2. Secant and cosecant are the reciprocals of the cosine and sine (respectively), so are the reciprocals of numbers that are at most 1. Therefore, they can never be less than 1 (in magnitude).
__
3. Tangent and cotangent (and secant and cosecant) are sometimes undefined because they are the ratios of triangle side lengths. The side length used in the denominator may be zero, causing the ratio to be undefined.
An article reported that for a sample of 40 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 165.23.
Calculate and interpret a 95% (two-sided) confidence interval for true average CO2 level in the population of all homes from which the sample was selected. (Round your answers to two decimal places.)
=(_________,__________) ppm
(b) Suppose the investigators had made a rough guess of 167 for the value of s before collecting data. What sample size would be necessary to obtain an interval width of 57ppm for a confidence level of 95%? (Round your answer up to the nearest whole number.)
=__________ kitchens
Answers
Answer: (a) (602.95,705.37)
(b) 33
Step-by-step explanation:
(a) Given : Sample size : [tex]n=40[/tex]
Sample mean : [tex]\overline{x}=654.16[/tex]
Standard deviation : [tex]\sigma= 165.23[/tex]
Significance level :[tex]\alpha=1-0.95=0.05[/tex]
Critical value : [tex]z_{\alpha/2}=1.96[/tex]
The confidence interval for population mean is given by :-
[tex]\mu\ \pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}[/tex]
[tex]=654.16\pm(1.96)\dfrac{165.23}{\sqrt{40}}\\\\\approx654.16\pm51.21\\\\=(654.16-51.21,\ 654.16+51.21)=(602.95,705.37)[/tex]
Hence, the 95% (two-sided) confidence interval for true average [tex]CO_2[/tex] level in the population of all homes from which the sample was selected.
(b) Given : Standard deviation : [tex]s= 167\text{ ppm}[/tex]
Margin of error : [tex]E=\pm57\text{ ppm}[/tex]
Significance level :[tex]\alpha=1-0.95=0.05[/tex]
Critical value : [tex]z_{\alpha/2}=1.96[/tex]
The formula to calculate the sample size is given by :-
[tex]n=(\dfrac{z_{\alpha/2}s}{E})^2\\\\\Rightarrow\ n=(\dfrac{(1.96)(167)}{57})^2=32.9758025239\approx33[/tex]
Hence, the minimum required sample size would be 33.
Which statements accurately describe Earth’s magnetic field? Check all that apply. The magnetic field lines flow from Antarctica to northern Canada. The magnetic field is created by magnetic rocks on the surface. The magnetic poles line up exactly with Earth’s geographic poles. The magnetic field is generated in Earth’s core. The magnetic field is similar to the magnetic field of a bar magnet.
Answers
Answer:
It’s A, D, and E
The magnetic field lines flow from Earth’s geographic South Pole to Earth’s
geographic North Pole.
The magnetic field is generated in Earth’s core.
The magnetic field is similar to the magnetic field of a bar magnet.
thank youhave a good day
Answer:
It’s A, D, and E.
Step-by-step explanation: Try and find out :)
Jk Jk it's right.
Determine whether the graph represents a proportional relationship.
yes, it is a proportional relationship because the graph goes through the origin
No, it is not a proportional relationship because the graph does not go through the origin
Yes, it is a proportional relationship because the graph is a straight line
No, it is not a proportional relationship because the graph is not a straight line
Answers
No, it is not a proportional relationship because the graph does not go through the origin. A proportional relationship is supposed to be a straight line, starting from the origin. It starts on the number 4.
The true statement is (b) No, it is not a proportional relationship because the graph does not go through the origin
Proportional relationships are represented with linear equations that begin from the origin.
From the attached figure, we can see that: the graph begins from (0,4)
For the graph to be proportional it must begin from (0,0) as the origin
This means that, the graph does not represent a proportional relationship.
Hence, the true statement is (b)
Read more about proportional relationships at:
https://brainly.com/question/24312388
Susan drove an average speed of 30 miles per hour for the first 30 miles of a trip & then at a average speed of 60 miles/hr for the remaining 30 miles of the trip if she made no stops during the trip what was susan's avg speed in miles/hr for the entire trip.(A) 35(B) 40(C) 45(D) 50(E) 55
Answers
Answer:
The correct option is B.
Step-by-step explanation:
It is given that Susan drove an average speed of 30 miles per hour for the first 30 miles of a trip & then at a average speed of 60 miles/hr for the remaining 30 miles of the trip.
[tex]Time=\frac{Distance}{Speed}[/tex]
Time taken by Susan in first 30 miles is
[tex]T_1=\frac{30}{30}=1[/tex]
Time taken by Susan in remaining 30 miles is
[tex]T_2=\frac{30}{60}=0.5[/tex]
Total distance covered by Susan is
[tex]D=30+30=60[/tex]
Total time taken by susan to complete 60 miles trip is
[tex]T=T_1+T_2[/tex]
[tex]T=1+0.5=1.5[/tex]
Susan's avg speed in miles/hr for the entire trip is
[tex]S=\frac{60}{1.5}=40[/tex]
The average speed of susan for entire trip is 40. Therefore the correct option is B.
A 50-foot ladder leans against a wall 15 feet from the base of the wall. What is the measure of the angle formed by the ladder and the wall? Please show all work.
Answers
Answer:
72.5°
Step-by-step explanation:
This is a right triangle problem. The ladder is the hypotenuse, and we have a length for that of 50 feet. We also have the distance along the ground that the ladder's base is from the wall against which it is leaning. This is the side adjacent to the angle for which we are seeking, so it the side adjacent to the angle, and it measures 15 feet.
We need a trig ratio that relates the side adjacent to the hypotenuse. That will be the cosine. Setting up:
[tex]cos\theta =\frac{adjacent}{hypotenuse}[/tex] and then filling in:
[tex]cos\theta=\frac{15}{50}[/tex]
Use the 2nd button on your calculator, and then press cos and you will get a display on your screen that looks like this:
[tex]cos^{-1}([/tex]
After that open parenthesis enter the fraction 15/50 and hit enter and you'll get the angle of 72.5 degrees, rounded.
just an addition to that superb reply above by @Luv2Teach
to the risk of sounding redundant.
Check the picture below.
make sure your calculator is in Degree mode.
Match the items.
a. value of a ratio
b. relationship reciprocal
c. denominator
d. numerator
e. equivalent ratios
f. factor
g. ratio
1. a comparison of two quantities or numbers
2. the quotient of the two values in a ratio
3. ratios with the same meaning or value
4. the number under the fraction line; indicates how many equal parts the whole was broken into
5. a number that divides evenly into another number
6. the number above the fraction line; indicates how many parts of the whole exist
7. two numbers whose product is 1
Answers
Answer:
1-a
2-b
3-e
4-c
5-g
6-d
7-f
Step-by-step explanation:
should be this
A baseball team plays in a stadium that holds 58,000 spectators. With ticket prices at $12, the average attendance had been 23,000. When ticket prices were lowered to $10, the average attendance rose to 29,000.
(a) Find the demand function (price p as a function of attendance x), assuming it to be linear.
(b) How should ticket prices be set to maximize revenue? (Round your answer to the nearest cent.)
Answers
Answer: the lower the price the more people want to come to the baseball game.
Step-by-step explanation:
Answer:
a) p = -x/3000 + 19 2/3
b) $9.83
Step-by-step explanation:
a) The 2-point form of the equation for a line can be used with the two given points. The attendance is said to be the independent variable.
y = (y2 -y1)/(x2 -x1)(x -x1) + y1
Here "y" is the price (p), and "x" is the attendance, so we have ...
p = (10 -12)/(29000 -23000)(x -23000) +12
p = -1/3000(x -23000) +12
p = -x/3000 + 19 2/3 . . . . price as a function of attendance
__
b) Revenue is the product of attendance and price. We can find the attendance associated with maximum revenue, then find the corresponding price.
R(x) = x·p = x(-x/3000 +19 2/3)
This has zeros at x=0 and x=3000(19 2/3) = 59,000. The maximum revenue corresponds to attendance halfway between these values, at x = 29,500. The demand function tells us the ticket price should be ...
p = -29500/3000 +19 2/3 = 9.83 . . . . dollars
_____
Comment on the problem working
I might have written the "demand function" to use price as the independent variable. Then the price is what you know when you find the maximum revenue; you don't have to do an extra step to find it.
x = 3000(19 2/3 -p)
xp = 3000p(19 2/3 -p) is maximized at p = (19 2/3)/2 = 9 5/6 ≈ 9.83
A probability distribution showing the probability of x successes in n trials, where the probability of success does not change from trial to trial, is termed aa. uniform probability distributionb. binomial probability distributionc. hypergeometric probability distributiond. normal probability distribution
Answers
Answer: binomial probability
Step-by-step explanation:
A binomial probability indicates to the probability of having exactly x successes on n repeated trials in an particular binomial experiment which has only two possible outcomes.
If the probability of success on an single trial is b (which does not change) , then , the probability of failure will be (1-b) .
The binomial probability for success in x trials out of n trials is given by :-
[tex]^nC_x\ b\ (1-b)^{n-x}[/tex]
Final answer:
The distribution called for a fixed number of independent trials with a constant success probability is the binomial probability distribution, defined by the equation P(X = x).
Explanation:
The probability distribution that shows the probability of x successes in n trials, where the probability of success does not change from trial to trial, is termed a binomial probability distribution. The key characteristics of a binomial distribution include a fixed number of independent trials with two possible outcomes (success or failure) and a constant probability of success in each trial.
Mathematically, the binomial distribution is defined using the equation P(X = x) = (n choose x) * px * qn-x, where p is the probability of success, q = 1 - p is the probability of failure, and (n choose x) is the combination of n taken x at a time.
Can someone help with this!? :)
Answers
The system of equations provided consists of a circle and a line:
1. [tex]\( x^2 + y^2 = 49 \)[/tex] (This represents a circle with a radius of 7, centered at the origin.)
2. [tex]\( y = -x - 7 \)[/tex] (This is a linear equation.)
The first equation has already been graphed, showing a circle with a radius of 7. To find the intersection points of the circle and the line, which are the solutions of the system, we can substitute the expression for y from the second equation into the first one:
[tex]\[ x^2 + (-x - 7)^2 = 49 \][/tex]
[tex]\[ x^2 + x^2 + 14x + 49 = 49 \][/tex]
[tex]\[ 2x^2 + 14x + 49 - 49 = 0 \][/tex]
[tex]\[ 2x^2 + 14x = 0 \][/tex]
[tex]\[ x(2x + 14) = 0 \][/tex]
This gives us two solutions for x:
[tex]\[ x = 0 \quad \text{or} \quad 2x + 14 = 0 \][/tex]
[tex]\[ x = 0 \quad \text{or} \quad x = -7 \][/tex]
Now we can substitute these x-values into the second equation to find the corresponding y-values:
For [tex]\( x = 0 \)[/tex]:
[tex]\[ y = -0 - 7 \][/tex]
[tex]\[ y = -7 \][/tex]
For [tex]\( x = -7 \)[/tex]:
[tex]\[ y = -(-7) - 7 \][/tex]
[tex]\[ y = 7 - 7 \][/tex]
[tex]\[ y = 0 \][/tex]
Therefore, the system of equations has two solutions where the line intersects the circle:
[tex]\[ (0, -7) \quad \text{and} \quad (-7, 0) \][/tex]
These calculations provide us with the step-by-step solution to the system of equations. The graphical solution would show the line [tex]\( y = -x - 7 \)[/tex] intersecting the circle [tex]\( x^2 + y^2 = 49 \)[/tex] at these two points.
Here is the graph showing the system of equations:
- The circle represented by [tex]\( x^2 + y^2 = 49 \)[/tex].
- The line represented by [tex]\( y = -x - 7 \).[/tex]
The red points indicate where the line intersects the circle, which are the solutions to the system of equations. These points are at (0, -7) and (-7, 0).