Answer:
Approximately 5.19 hours.
Step-by-step explanation:
The question is asking that you solve for T (the amount of time spent with patients in a day). To do so, simply input the values which it has given you for your variables. We can substitute 16 for I as that is the doctor's preferred interval time and we can substitute 21 for N as that is the amount of appointments the doctors wishes to have per day.
[tex]16=1.08(\frac{T}{21} )[/tex]
To solve, start by multiplying both sides by 21.
[tex]336=1.08T[/tex]
Next, divide both sides by 1.08.
[tex]311.11=T[/tex]
Your answer comes out to 311.11 minutes. The question is asking for this to be translated into hours per day, which equates to approximately 5.19 hours.
The required hours per day is 5.19 hours a day needed by doctors to spend with patients.
Given that,
The interval time, I, in minutes, between appointments is related to the total number of minutes T that a doctor spends with patients in a day, and the number of appointments N, by the formula: I = 1.08 (T/N).
I = 16 minutes, N = 21.
Functions are the relationship between sets of values. e g y=f(x), for every value of x there is its exists in a set of y. x is the independent variable while Y is the dependent variable.
Here,
I = 1.08 (T / N)
16 = 1.08 * T / 21
T = 16 * 21 / 1.08
T = 311.11 minutes
T = 311.11 / 60 hours
T = 5.19 hours
Thus, the required hours per day is 5.19 hours a day needed for doctors to spend with patients.
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Which of the following are binomials?
Check all that are:
A. x^4+x^2+1
B. 5/7y^3+5y^2+y
C. x^11
D. 6x^2+1/2y^3
E. x^2+3
F. 8x
Answer:
so, I believe D and E, are Binomials.
Step-by-step explanation:
Bi- is 2
Mono- is 1
Hope my answer has helped you and if not i'm sorry.
Sarah fenced in her backyard. The perimeter of the yard is s18 feet, and the width of the yard is 4 feet. Use the perimeter formula to find the lenght of the rectangular yard in inches: P = 2L + 2W
Answer:
60 inches
Step-by-step explanation:
Put the given numbers in the formula and solve for the remaining unknown.
P = 2L +2W
18 ft = 2L +2×(4 ft)
10 ft = 2L . . . . . . . . . subtract 8 ft
5 ft = L . . . . . . . . . . . divide by 2
You want this in inches, so you make use of the fact that each foot is 12 inches.
5 ft = 5×(12 in) = 60 in
The length of Sarah's fenced yard is 60 inches.
Answer:
60 IN
Step-by-step explanation:
DID THE QUIZ AND GOT IT CORRECT
For the opening home game of the baseball season, the Madd Batters minor league baseball team offered the following incentives to its fans: Every 75th fan who entered the stadium got a coupon for a free hot dog. Every 30th fan who entered the stadium got a coupon for a free cup of soda. Every 50th fan who entered the stadium got a coupon for a free bag of popcorn. The stadium holds 4000 fans and was completely full for this game. How many of the fans at the game were lucky enough to receive all three free items?
There were 26 fans at the game who were lucky enough to receive all three free items.
Explanation:The Madd Batters minor league baseball team offered different incentives to its fans for the opening home game.
To determine how many fans were lucky enough to receive all three free items, we need to find the total number of fans that satisfy each condition.
The least common multiple of 75, 30, and 50 is 150.
So, we divide 4000 by 150 to find the number of fans that satisfy the conditions for all three items.
Therefore, 26 fans at the game were lucky enough to receive all three free items.
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Arthur is comparing the prices of two rental car companies. Company A charges $22 per day and an additional $5 as service charges. Company B charges $20 per day and an additional $16 as service charges.
21
Step-by-step explanation:
Answer:
company A because its less money
Step-by-step explanation:
Find the value of tan( π + θ) if θ terminates in Quadrant III and sinθ = -5/13.
-5/13
-5/12
0
5/12
we know that θ is in the III Quadrant, and let's recall that on the III Quadrant sine and cosine are both negative, and since tangent = sine/cosine, that means that tangent is positive. Let's also keep in mind that tan(π) = sin(π)/cos(π) = 0/-1 = 0.
well, the hypotenuse is just a radius unit, so is never negative, since we know sin(θ) = -(5/13), well, the negative number must be the 5, so is really (-5)/13.
[tex]\bf sin(\theta )=\cfrac{\stackrel{opposite}{-5}}{\stackrel{hypotenuse}{13}}\impliedby \textit{let's find the \underline{adjacent side}} \\\\\\ \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies \pm\sqrt{c^2-b^2}=a \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ \pm\sqrt{13^2-(-5)^2}=a\implies \pm\sqrt{144}=a\implies \pm 12 =a\implies \stackrel{III~Quadrant}{-12=a} \\\\[-0.35em] ~\dotfill[/tex]
[tex]\bf tan(\theta )\implies \cfrac{sin(\theta )}{cos(\theta )}\implies \cfrac{~~-\frac{5}{13}~~}{-\frac{12}{13}}\implies -\cfrac{5}{~~\begin{matrix} 13 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}\times -\cfrac{~~\begin{matrix} 13 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}{12}\implies \cfrac{5}{12} \\\\[-0.35em] ~\dotfill[/tex]
[tex]\bf tan(\pi +\theta )=\cfrac{tan(\pi )+tan(\theta )}{1-tan(\pi )tan(\theta )}\implies tan(\pi +\theta )=\cfrac{0+\frac{5}{12}}{1-0\left( \frac{5}{12} \right)} \\\\\\ tan(\pi +\theta )=\cfrac{~~\frac{5}{12}~~}{1}\implies tan(\pi +\theta )=\cfrac{5}{12}[/tex]
The value is 5/12.
To find the value of tan(π + θ) given that θ terminates in Quadrant III and sinθ = -5/13, we need to first note that in the third quadrant, both sine and tangent are negative. Since we already have the value for sine, we can use the Pythagorean identity to find the value for cosine. The identity is sin^2θ + cos^2θ = 1.
Starting with sinθ = -5/13, we square both sides to get sin^2θ = 25/169. Then, we use the Pythagorean identity to solve for cos^2θ which gives us cos^2θ = 1 - 25/169 = 144/169. Taking the positive and negative square root, since cosine is also negative in the third quadrant, we choose the negative root, cosθ = -12/13.
Now, tanθ is the ratio of sine to cosine, which is tanθ = sinθ/cosθ = (-5/13) / (-12/13). This simplifies to tanθ = 5/12. However, the question asks for tan(π + θ), not tanθ. The tangent function has a period of π, so tan(π + θ) = tanθ. Therefore, the answer is 5/12.
Select the graph that shows the solution set for the following system.
x + y < 2
x>2
Answer:
Answer is in the attachment.
Step-by-step explanation:
To graph x>2 consider first x=2. x=2 is a vertical line and if you want to graph x>2 you need to shade to the right of the vertical line.
To graph x+y<2, I will solve for y first.
x+y<2
Subtract x on both sides:
y<-x+2
Consider the equation y=-x+2. This is an equation with y-intercept 2 and slope -1 or -1/1. So the line you have in that picture looks good for y=-x+2. Now going back to consider y<-x+2 means we want to shade below the line because we had y<.
Now where you see both shadings will be intersection of the shadings and will actually by your answer to system of inequalities you have. In my picture it is where you have both blue and pink.
I have a graph in the picture that shows the solution.
Also both of your lines will be solid because your question in the picture shows they both have equal signs along with those inequality signs.
Just in case my one graph was confusing, I put a second attachment with just the solution to the system.
The monthly wind speeds over a one-year period at Denver International Airport were recorded and the values for each month averaged. The average monthly wind speeds, in mph, from January to December during that time period were 9.7, 10.0, 10.8, 11.9, 11.0, 10.7, 10.3, 10.1, 9.9, 9.9, 9.6, and 10.1.
use the statistics calculator to find the statistical measures.
The median of the data set is .
The mean of the data set is .
The population standard deviation of the data set is .
Answer:
median: 10.1
mean: 10.333
SD: 0.632
The median of the data set is 10.1 mph. The mean of the data set is 10.26 mph. The population standard deviation of the data set is approximately 0.5339 mph.
Explanation:The median of a data set is the middle value when the data is arranged in ascending or descending order. To find the median of the given data set, we need to arrange the wind speeds in ascending order:
9.69.79.99.910.010.110.110.310.710.811.011.9Since we have 12 values in the data set, the median will be the average of the 6th and 7th values, which are both 10.1. Therefore, the median of the data set is 10.1 mph.
The mean or average of a data set is found by summing all the values and dividing by the number of values. For the given data set, the sum of the wind speeds is 123.1 mph (9.6 + 9.7 + 9.9 + 9.9 + 10.0 + 10.1 + 10.1 + 10.3 + 10.7 + 10.8 + 11.0 + 11.9) and there are 12 values. Dividing the sum by 12, the mean of the data set is 10.26 mph.
The population standard deviation is a measure of the spread or dispersion of the data. To calculate it, we need to subtract the mean from each value, square the result, sum them all, divide by the number of values, and take the square root. Using the given wind speeds:
(9.6 - 10.26)^2 = 0.0576(9.7 - 10.26)^2 = 0.3136(9.9 - 10.26)^2 = 0.0964(9.9 - 10.26)^2 = 0.0964(10.0 - 10.26)^2 = 0.0676(10.1 - 10.26)^2 = 0.0256(10.1 - 10.26)^2 = 0.0256(10.3 - 10.26)^2 = 0.0016(10.7 - 10.26)^2 = 0.0196(10.8 - 10.26)^2 = 0.0324(11.0 - 10.26)^2 = 0.0544(11.9 - 10.26)^2 = 2.7264Summing these values gives us 3.4368. Dividing by 12, we get 0.2864. Finally, taking the square root, the population standard deviation of the data set is approximately 0.5339 mph.
Correlation is a measure of the extent to which two factors are _______
Answer:
relatedExplanation:
Correlation is a numerical value that tells how two variables or factors change together.
The correlation between two factors may be positive, negative or nonexistent.
A strong association is shown when the graph of the points representing the factors are reasonably well represented by a line.
A perfect positive correlation is when the two variables are related by a linear function with positive slope (the two factors grow together).
A perfect negative correlation exists when the two factors are related by a linear function with negative slope (one factor grows when the other factor decreases).
A nonexistent correlation is when the two factors are not related in any way to each other and so none function can be obtained.
Final answer:
Correlation measures how two variables are related, with the correlation coefficient indicating the strength and direction of this relationship. The coefficient ranges from -1 to +1, where +1 is a perfect positive correlation and -1 is a perfect negative correlation.
Explanation:
Correlation is a measure of the extent to which two factors are related. Specifically, it refers to how one variable changes in relation to another. The statistical measure used to describe this is called a correlation coefficient, represented by the letter r.
The value of r ranges from -1 to +1, where +1 signifies a perfect positive correlation, -1 signifies a perfect negative correlation, and 0 indicates no correlation at all.
Positive correlation happens when both variables change in the same direction, either increasing or decreasing together. Conversely, a negative correlation indicates that as one variable increases, the other decreases.
While correlation is a useful statistical tool to identify a relationship between two variables, it is crucial to understand that correlation does not imply causation.
This means that just because two variables are correlated, it does not necessarily mean that one variable causes the other to change.
In the xy-plane, a parabola defined by the equation y=(x-8)^2 intersects the line defined by the equation y=36 at two points, P and Q. What is the length of PQ?
A) 8
B) 10
C) 12
D) 14
Answer:
12
Step-by-step explanation:
Alright so we are asked to find the intersection of y=(x-8)^2 and y=36.
So plug second equation into first giving: 36=(x-8)^2.
36=(x-8)^2
Take square root of both sides:
[tex]\pm 6=x-8[/tex]
Add 8 on both sides:
[tex]8 \pm 6=x[/tex]
x=8+6=14 or x=8-6=2
So we have the two intersections (14,36) and (2,36).
We are asked to compute this length.
The distance formula is:
[tex]\sqrt{(14-2)^2+(36-36)^2}[/tex]
[tex]\sqrt{14-2)^2+(0)^2[/tex]
[tex]\sqrt{14-2)^2[/tex]
[tex]\sqrt{12^2}[/tex]
[tex]12[/tex].
I could have just found the distance from 14 and 2 because the y-coordinates were the same. Oh well. 14-2=12.
Hiro is creating a smaller scaled replica of a triangular canvas.
Which of the following expressions will help him determine the length of segment AB?
AB = AD
AB = AC
AB= AC times AE/AD
AB= AE times AD/AB
Answer:
AB= AC times AE/AD
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional
so
In this problem
AB/AC=AE/AD
solve for AB
AB=(AC)(AE)/AD
Answer:
AB= AC times AE/AD
Step-by-step explanation:
AB is on the segment AC, therefore it is proportional to AC .
In order to fulfill the requirement that triangle ABE is a smaller scaled replica of triangle ACD, a scale factor must be applied to the sides of the original figure; in this case, the factor is AE/AD.
The double number line shows that in 3 seconds an ostrich can run 63 meters . Based on the ratio shown in the double number line how far can the ostrich run in 5 seconds
Answer:
Ostrich can run in 5 second = 105 meter .
Step-by-step explanation:
Given : The double number line shows that in 3 seconds an ostrich can run 63 meters .
To find : Based on the ratio shown in the double number line how far can the ostrich run in 5 seconds.
Solution : We have given
ostrich can run in 3 second = 63 meter .
Let ostrich can run in 5 second = x meter .
By the Ratio : 63 : 3 :: x : 5
[tex]\frac{63}{3} =\frac{x}{5}[/tex]
On cross multiplication
63 * 5 = 3 * x
315 = 3 x
On dividing both sides by 3
x = 105 meter .
Therefore, ostrich can run in 5 second = 105 meter .
This question is "Decompose figures to find volume"
This question that im struggling with is really kinda hard for me....
Answer : The total volume of figure is, [tex]162in^3[/tex]
Step-by-step explanation :
First we have to calculate the volume of cuboid A.
[tex]V_A=l\times b\times h[/tex]
where,
[tex]V_A[/tex] = volume of cuboid A
l = length of cuboid = 9 in
b = breadth of cuboid = 5 in
h = height of cuboid = 2 in
[tex]V_A=9in\times 5in\times 2in[/tex]
[tex]V_A=90in^3[/tex]
Now we have to calculate the volume of cuboid B.
[tex]V_B=l\times b\times h[/tex]
where,
[tex]V_B[/tex] = volume of cuboid B
l = length of cuboid = 9 in
b = breadth of cuboid = 1 in
h = height of cuboid = 2 in
[tex]V_B=9in\times 1in\times 2in[/tex]
[tex]V_B=18in^3[/tex]
Now we have to calculate the volume of cuboid C.
[tex]V_C=l\times b\times h[/tex]
where,
[tex]V_C[/tex] = volume of cuboid C
l = length of cuboid = 9 in
b = breadth of cuboid = 1 in
h = height of cuboid = (8-2=6) in
[tex]V_C=9in\times 1in\times 6in[/tex]
[tex]V_C=54in^3[/tex]
Now we have to calculate the total volume of figure.
Total volume of figure = [tex]V_A+V_B+V_C[/tex]
Total volume of figure = [tex]90in^3+18in^3+54in^3[/tex]
Total volume of figure = [tex]162in^3[/tex]
Thus, the total volume of figure is, [tex]162in^3[/tex]
A ball is dropped from a certain height. The function below represents the height f(n), in feet, to which the ball bounces at the nth bounce:
f(n) = 9(0.7)n
What does the number 0.7 represent?
The ball bounces to 30% of its previous height with each bounce.
The height at which the ball bounces at the nth bounce is 0.3 feet.
The ball bounces to 70% of its previous height with each bounce.
The height from which the ball was dropped at the nth bounce is 0.7 feet.
Answer:
The ball bounces to 70% of its previous height with each bounce.
Step-by-step explanation:
In physics terminology, the number 0.7 is the coefficient of restitution. It is the ratio of the height of bounce (n+1) to the height of bounce (n).
The meaning of the number is that the ball bounces to 70% of the height of the previous bounce.
Answer:
The ball bounces to 70% of its previous height with each bounce.
Step-by-step explanation:
A ball is dropped from a certain height. The function below represents the height f(n), in feet, to which the ball bounces at the nth bounce:
f(n) = 9(0.7)n
The number 0.7 represents that the ball bounces to 70% of its previous height with each bounce.
The two roots a+sqrb and a-sqr b are called _______radicals.
Answer:
Conjugate radicals.
Step-by-step explanation:
The two roots a+sqrb and a-sqr b are called conjugate radicals.
Please help! 50 points!!! and brainliest
Select the correct answer.
What is the nth term of the geometric sequence 4, 8, 16, 32, ...?
A. `a_(n)=2(4)^(n-1)`
B. `a_(n)=4(2)^(n-1)`
C. `a_(n)=2(n)^4`
D. `a_n=4(n)^2`
Find the common ratio between each number given:
8/4 = 2
16/8 = 2
32/16 = 2
The common ratio is constant at 2, which means the next number would be 32 x 2.
A geometric series equation is written as an = a1r^n-1
Where a1 is the first term, r is the ratio and n is the term you want to find.
r was determined to be 2. The first term is given as 4 ( the first number in the series).
This means the equation becomes an = 4(2)^n-1
The answer would be B.
Answer:
The answer is B
Step-by-step explanation:
"the fromula for the perminter of a rectangle is given by P= 2L +2W where l is the length and w is the width. Assume the ermiter of a rectangular plot of land is 480 ft. The length is twice the width. Find the length of rectangular plot of land
Answer:
The length of rectangular plot of land is 160 ft.
Step-by-step explanation:
L = 2 W (the length is twice the width)
P = 480 ft. (perimeter of rectangular plot of land)
L = ?
2. 2W + 2W= 480 ft >>> (2 times twice width=L) + 2W=480 ft.
4W + 2W= 480 ft >>>> 6W= 480 ft.
W= 80 ft.
L = 2. 80 = 160 ft. (Length is twice the width)
P= 2L + 2W (formula for the perimeter)
2. 160 + 2. 80 = 480 ft.
For a binomial distribution with a sample size equal to 10 and a probability of a success equal to 0.30, what is the probability that the sample will contain exactly three successes? Use the binomial formula to determine the probability. Round to four decimal places.
Answer:
The probability that the sample will contain exactly three successes is 0.2668.
Step-by-step explanation:
Given information:
Sample size = 10
Probability of a success, p=0.30
Probability of a failure q=1-p = 1-0.30 = 0.70
The binomial formula to determine the probability is
[tex]P(X=r)=^nC_rp^rq^{n-r}[/tex]
where, n is the sample size, r is required number of success, p is probability of success and q is probability of failure.
We need to find the probability that the sample will contain exactly three successes.
[tex]P(X=3)=^{10}C_3(0.30)^3(0.70)^{10-3}[/tex]
[tex]P(X=3)=^{10}C_3(0.30)^3(0.70)^{7}[/tex]
[tex]P(X=3)=(120)(0.0022235661)[/tex]
[tex]P(X=3)=0.266827932[/tex]
[tex]P(X=3)\approx 0.2668[/tex]
Therefore the probability that the sample will contain exactly three successes is 0.2668.
Using the binomial distribution, it is found that there is a 0.2668 = 26.68% probability that the sample will contain exactly three successes.
What is the binomial distribution formula?The formula is:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
The parameters are:
x is the number of successes.n is the number of trials.p is the probability of a success on a single trial.In this problem:
The sample size is of n = 10.The probability of a success is of p = 0.3.The probability that the sample will contain exactly three successes is P(X = 3), hence:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = x) = C_{10,3}.(0.3)^{3}.(0.7)^{7} = 0.2668[/tex]
More can be learned about the binomial distribution at https://brainly.com/question/24863377
Both the red and blue line segments stretch from center of the circle to a point on the the circle. The length of the blue line segment is 7. How long is the red line segment?
Which of the following is an equation of a line that is parallel to y = 4 x + 9 ? (Choose all correct equations.)
y = 2 x + 9
y = 4 x − 7
12 x − 3 y = 6
− 20 x + 5 y = 45
Answer:
The second, third and fourth are parallel to the given equation
Step-by-step explanation:
In order to determine if the slopes are the same, put all of the equations in slope-intercept form: y = mx + b. In order for lines in this form to be parallel, the m values of each have to be the exact same number, in our case, 4. Equation 2 has a 4 in the m position, just like the given, so that one is easy. Equation 2 is parallel.
Let's solve the third equation for y:
12x - 3y = 6 so
-3y = -12x + 6 and
y = 4x - 2. Equation 3 is parallel since there is a 4 in the m position.
Let's solve the fourth equation for y:
-20x + 5y = 45 so
5y = 20x + 45 and
y = 4x + 9. Equation 4 is also parallel since there is a 4 in the m position.
What is the value of x in trapezoid ABCD? x=15 x=20 x=45 x=60
Answer:
A. X = 15 is the correct answer.
Step-by-step explanation:
It's the only one that really makes sense.
Hope this helped :)
The value of the variable x will be 15. Then the correct option is A.
What is a trapezoid?It is a polygon that has four sides. The sum of the internal angle is 360 degrees. In a trapezoid, one pair of opposite sides are parallel.
The trapezoid is an isosceles trapezoid.
An isosceles trapezoid is the form of trapezoid on which the non-parallel sides are of equal length.
In the isosceles trapezoid, the sum of the opposite angles is 180 degrees.
Then the sum of the angle B and angle D will be 180°.
∠B + ∠D = 180°
9x + 3x = 180
12x = 180°
x = 180°
x = 15°
Thus, the value of the variable x will be 15.
Then the correct option is A.
The question was incomplete, but the complete question is attached below.
More about the trapezoid link is given below.
https://brainly.com/question/22607187
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5 kilograms of coffee are going going to be shared equally among 4 people.
How many kilograms of coffee does each person get?
Choose 1 Answer:
Answer:
B: between 1 and 2
Step-by-step explanation:
Since you share 5 kg amongst 4 you need to divide it by 4.
5 / 4 = 1.25 kg
This is between 1 and 2 kg
Answer: B. Between 1 and 2 kilograms.
Step-by-step explanation: Divide the amount of coffee by the number of people.
5/4=1.25.
Each person will get 1.25 kilograms of coffee, which is between 1 and 2 kilograms.
If in right triangle ABC with right angle C, sin A = 3/5 then what is the value of sin B?
Check the picture below.
For this case we have to define trigonometric relationships in rectangular triangles that the sine of an angle is given by the leg opposite the angle, on the hypotenuse of the triangle.
If we have to:
[tex]Sin A = \frac {3} {5}[/tex]
So:
Leg opposite angle A is: 3
The hypotenuse is: 5
If we apply the Pythagorean theorem, we find the value of the other leg:
[tex]x = \sqrt {5 ^ 2-3 ^ 2}\\x = \sqrt {25-9}\\x = \sqrt {16}\\x = 4[/tex]
So, the Sine of B is given by:
[tex]Sin B = \frac {4} {5}[/tex]
Answer:
[tex]SinB = \frac {4} {5}[/tex]
Four buses carrying 148 students from the same school arrive at a football stadium. The buses carry, respectively, 40, 33, 25, and 50 students. One of the students is randomly selected. Let X denote the number of students that were on the bus carrying the randomly selected student. One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on her bus. (a) Which of E[X] or E[Y] do you think is larger? Why? (b) Compute E[X] and E[Y].
Answer:
E[X] is larger than E[Y]
E[X] = 39.283784 and E[Y] = 37
Step-by-step explanation:
Given data
total students = 148
bus 1 students = 40
bus 2 students = 33
bus 3 students = 25
bus 4 students = 50
to find out
E[X] and E[Y]
solution
we know bus have total 148 students and 4 bus
so E[X] is larger than E[Y] because maximum no of students are likely to chosen to bus and probability of bus is 1/4 as chosen students
and probability of 40 i.e. P(40) students = 40/148
P(33) = 33/148
P(25) = 25 / 148
P(50) = 50 / 148
first we find out i.e
E[X] = 40 P(40) + 33 P(33)+ 25 P(25)+ 50 P(50)
E[X] = 40 (40/148) + 33 (33/148)+ 25 (25/148)+ 50 (50/148)
E[X] = 39.283784
and
y is bus chosen
E[Y] = 1/4 (40+ 33 + 25 + 50)
so E[Y] = 1/4 (40+ 33 + 25 + 50)
E[Y] = 1/4 (148)
E[Y] = 37
so E[X] = 39.283784 and E[Y] = 37
The values of E[X] and E[Y] can be calculated by finding the sum of the product of each bus's student count and their respective probabilities. E[X] is expected to be less than E[Y] because students are chosen from each bus inversely proportional to the bus's total students, while for Y, each bus has equal probability of being chosen.
Explanation:The problem describes an expectation value calculation in the context of probability for two random variables X and Y. X represents a randomly selected student from 148 students who arrived at a stadium in 4 different buses and Y represents a randomly selected bus from the 4 buses and its number of students.
Let's calculate the expected value for X (E[X]) and Y (E[Y]). The expected value of a random variable is computed as a weighted average of the possible outcomes, where each outcome is weighted by its probability. The formula is E(X) = µ = Σ xP(x). Therefore, we need to find the number of students on each bus and their respective probabilities.
For bus 1, we have 40 students, for bus 2, we have 33 students, for bus 3, we have 25 students, and for bus 4, we have 50 students. These numbers represent the possible outcomes for both random variables X and Y. Now, we need to find their respective probabilities, which are determined by the number of students in each bus divided by the total number of students (148).
For X or E[X], the probability of any student being chosen is inversely proportional to the number of students in each bus (since the student is being randomly chosen), while for Y or E[Y], the probability of any bus being chosen is the same (since the bus is being randomly chosen). Therefore, we can expect E[X] to be less than E[Y], as the probability distribution for Y is more weighted towards buses with more students.
To calculate E[Y] and E[X], we follow the expected value formula and multiply each outcome (each bus's number of students) by its probability for both X and Y. So, E[X] is summation over { 40 * ( 40 / 148), 33 * ( 33 / 148), 25 * ( 25 / 148), 50 * ( 50 / 148) } and E[Y] is summation over { 40 * ( 1 / 4), 33 * ( 1 / 4), 25 * ( 1 / 4), 50 * ( 1 / 4) } respectively.
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In the figure below, if arc XY measures 116 degrees, what is the measure of angle ZYX?
Answer:
∠ZYX = 58°
Step-by-step explanation:
The measure of an inscribed angle or a tangent- chord angle is one half the measure of the intercepted arc.
arc XY is the intercepted arc, hence
∠ZYX = 0.5 × 116° = 58°
Answer: [tex]ZYX=58\°[/tex]
Step-by-step explanation:
It is important to remember that, by definition:
[tex]Tangent\ chord\ Angle=\frac{1}{2}Intercepted\ Arc[/tex]
In this case you know that for the circle shown in the figure, the arc XY measures 120 degrees, therefore you can find the measure of the angle ZYX. Then you get that the measure of the this angle is the following:
[tex]ZYX=\frac{1}{2}XY\\\\ZYX=\frac{1}{2}(116\°)\\\\ZYX=58\°[/tex]
Find the minimum and maximum possible areas of a rectangle measuring 2 km by 5 km
Answer:
minimum: 6.75 km²maximum: 13.75 km²Step-by-step explanation:
Such questions generally arise in the context of measurement precision and/or accuracy. Apparently, we're to assume that these dimensions could be arrived at by rounding to the nearest km. In that case, they can be taken to have a possible error of ±0.5 km.
The minimum possible area is the product of the minimum possible dimensions: 1.5 km by 4.5 km = 6.75 km².
The maximum possible area is the product of the maximum possible dimensions: 2.5 km by 5.5 km = 13.75 km².
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Comment on combining measurement values
You will note that the nominal area is 2 km by 5 km = 10 km², and that the middle value between the minimum and maximum is slightly more than this, at 10.25 km².
It is typically the case that when measurements are combined by operations other than addition and subtraction, the nominal result is different from the middle result in the range of possibilities.
What are the two requirements for a discrete probability distribution?
Answer:
[tex]1.\ \ p(x)\geq0 & \text{ for all values of x.}\\\ 2.\ \sum\ p(x)=1[/tex]
Step-by-step explanation:
There are two requirements for a discrete probability distribution that must be satisfied as :-
1. Each probability must be greater than equals to zero.
2. Sum of all probabilities should be equals to 1.
The above conditions are also can be written as :
[tex]1.\ \ p(x)\geq0 & \text{ for all values of x.}\\\ 2.\ \sum\ p(x)=1[/tex]
A discrete probability distribution must satisfy two conditions: each individual outcome probability must be between 0 and 1, and the total of all outcome probabilities must equal to 1.
Explanation:There are two key requirements that a set of data must meet to be considered a discrete probability distribution:
The probabilities of all outcomes must be between 0 and 1 (inclusive). This means that for any random variable X, the probability P(X) is such that 0 ≤ P(X) ≤ 1.The sum of the probabilities of all possible outcomes must be equal to 1. This is based on the law of total probability. For example, if we denote the random variable's outcomes as x, and their corresponding probabilities as p(x), then the sum of all p(x) should equal 1, denoted mathematically as: ∑ p(x) = 1.Learn more about Discrete Probability Distribution here:https://brainly.com/question/33727484
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HELP ME!!
Select the correct answer from each drop-down menu.
Complete the statement.
If and θ is in quadrant III, and .
The correct answer from each drop-down menu is:
If cost 8 = 8 and tan20 = 17, then cos28 = -8/17.
To solve this problem, we can use the double angle formula for cosine:
cos2θ = 2cos²θ - 1
We know that cos20 = 17, so we can substitute this value into the formula:
cos2(20°) = 2(cos20°)² - 1
cos2(20°) = 2(17²)² - 1
cos2(20°) = -8/17
Therefore, the correct answer is cos28 = -8/17.
In circle A below, if angle BAC measures 30 degrees, what is the measure of arc BC?
Answer:
30°
Step-by-step explanation:
The measure of the arc is the same as the measure of the central angle that intercepts it, hence
m AC = ∠BAC = 30°
Answer: The measure of arc BC is 30°
Step-by-step explanation:
It is important to remember that, by definition:
[tex]Central\ angle = Intercepted\ arc[/tex]
Therefore, in this case, knowing that the angle BAC (which is the central angle) in the circle provided measures 30 degrees, you can conclude that the measure of arc BC (which is the intercepted arc) is 30 degrees.
Then you get that the answer is:
[tex]BAC=BC[/tex]
[tex]BC=30\°[/tex]
please help im confused
Answer:
m∠1 = 43°27'm∠2 = 136°33'm∠4 = 136°33'Step-by-step explanation:
Angles 1 and 3 are vertical angles, so are equal:
m∠1 = m∠3 = 43°27'
Angles 2 and 3 are a linear pair, so are supplementary:
m∠2 = 180° - m∠3 = 180° - 43°27' = 136°33'
Angles 2 and 4 are also vertical angles, so are equal:
m∠4 = m∠2 = 136°33'
_____
There are 60 minutes in a degree, so 180° is the same as 179°60'. Subtraction can proceed in the usual way after this rewrite:
180° - 43°27' = 179°60' -43°27'
= (179 -43)° +(60 -27)' = 136°33'
The amount of time (t) in minutes it takes Jeff to mow an average sized yard is related to (n) the number of yards he mows. The equation is t = 2n + 12. How many lawns does Jeff mow if it takes him 30 minutes?
Answer:
Jeff mows 9 yards of lawn in 30 minutes
Step-by-step explanation:
The equation that models the amount of time (t) in minutes it takes Jeff to mow an average sized yard is [tex]t=2n+12[/tex], where n is the number of yards he mows.
To find the number of yards Jeff mows in 30 minutes, we set the equation to 30 and solve for n.
[tex]\implies 2n+12=30[/tex]
Add -12 to both sides:
[tex]\implies 2n=30-12[/tex]
[tex]\implies 2n=18[/tex]
Divide both sides by 2
[tex]\implies \frac{2n}{2}=\frac{18}{2}[/tex]
[tex]\implies n=9[/tex]
Hence Jeff mows 9 yards of lawn in 30 minutes.
Final answer:
Jeff mows 9 lawns if it takes him 30 minutes, based on the equation t = 2n + 12
Explanation:
The question asks us to find out how many lawns Jeff mows if it takes him 30 minutes. The relationship between the amount of time (t) in minutes and the number of yards he mows (n) is given by the equation t = 2n + 12. Since we are given that t = 30 minutes, we can substitute the value of t into the equation to solve for n, the number of lawns.
30 = 2n + 12
By subtracting 12 from both sides of the equation we get:
18 = 2n
Next, we divide both sides of the equation by 2 to solve for n:
n = 9
Therefore, Jeff mows 9 lawns if it takes him 30 minutes.