Two people started from the same point at the same time and traveled in opposite directions. One traveled at 60 mph and the other at 50 mph. How long will it take before the two people are 440 miles apart?
When the sample size and sample standard deviation remain the same, a 99% confidence interval for a population mean, µ will be narrower than the 95% confidence interval for µ?
Using the equation for the margin of error, it is found that the 99% confidence interval will be wider than the 95% confidence interval for µ.
What is the margin of error of a confidence interval?The margin of error of a confidence interval is given by an equation in the following format:
[tex]M = t\frac{s}{\sqrt{n}}[/tex]
In which:
t is the critical value, which increases as the confidence level increases.s is the standard deviation of the sample.n is the sample size.In this problem, a 99% confidence interval will have a higher value of t than a 95% confidence interval, hence a higher margin of error, and thus will be wider.
You can learn more about the margin of error of a confidence interval at https://brainly.com/question/25779324
Evaluate C(7, 7).
A: 0
B: 1
C: 7
If you can, could you please explain how you got your answer. These problems honestly don't make any sense to me and I'm turning towards here as a last resort. Thanks in advance.
Answer:
Answer = 1
Step-by-step explanation:
hey can you please help me posted picture of question
If you wanted to vertically stretch the graph of F(x) = |x| by five units, what would the equation of the new function, G(x), be?
A. G(x)=|x|-5
B. G(x)=|x+5|
C. G(x)=5|x|
D.G(x)=|5x|
mcr apex
Solution:
The Preimage function is , F(x)=|x|
Consider a point (a,b) on the function, F(x)=|x|. it means
b=|a|-----(1) satisfies the function.
Now the function F(x)=|x| is vertically stretched by 5 units.It means
x=a , y= b+5
x=a, b=y-5
So, putting the value of a and b in equation (1).
y-5=|x|
y= |x| + 5 is vertical stretch of y= |x| by 5 units.
What is the equation of a line, in general form, that passes through point (1, -2) and has a slope of .
3x - y - 7 = 0
x - 3y + 7 = 0
x - 3y - 7 = 0
List all integers between -15 and 25 that are congruent to 3 mod (11)
American cheese 0.45 to 4.26 what is the percent increase
{ x - y = 4 3x - 6y = -12 graph
Solve the equation for x, where x is a real number:
-4x^2 + 5x - 7 = 0
Show that the vector field f(x,y,z)=⟨ycos(−2x),−2xsin(y),0⟩f(x,y,z)=⟨ycos(−2x),−2xsin(y),0⟩ is not a gradient vector field by computing its curl. how does this show what you intended?
Final answer:
To show that the given vector field is not a gradient vector field, we need to compute its curl. The curl is computed by taking the cross product of the gradient operator with the vector field. By computing the partial derivatives and simplifying, we find that the curl of the given vector field is not zero, which indicates that it is not a gradient vector field.
Explanation:
To show that the vector field is not a gradient vector field, we need to compute its curl. The given vector field is f(x,y,z) = <ycos(-2x), -2xsin(y), 0>. The curl of a vector field is defined as the cross product of the gradient operator with the vector field. In this case, the curl of f(x,y,z) is computed as:
curl(f) = ∇ × f = (∂f_z/∂y - ∂f_y/∂z)i + (∂f_x/∂z - ∂f_z/∂x)j + (∂f_y/∂x - ∂f_x/∂y)k
By computing the partial derivatives and simplifying, we find that:
∂f_z/∂y = 0∂f_y/∂z = 0∂f_x/∂z = 0∂f_z/∂x = 2ycos(-2x)∂f_y/∂x = 0∂f_x/∂y = -2sin(y)Substituting these values back into the curl formula, we get:
curl(f) = (2ycos(-2x))i + 0j + (-2sin(y))k
This shows that the curl of the vector field is not zero, which means the vector field is not a gradient vector field.
If pluto's average distance is approximately 100 times mercury's average distance, how many units on the logarithmic scale is pluto from mercury?
when you multiply 2/3 by a fraction less than one, how does the product compare to the factors. Explain.
please
A small school employs 5 teachers who make between $40,000 and $70,000 per year The newest teacher, Valerie, decides to teach part-time which decreases her salary from $40,000 to $20,000 per year. The rest of the salaries stay the same How will decreasing Valerie's salary affect the mean and median?
You can use the fact that median is affected only if the middle value(s) are changed if number of values are same.
The mean salary will become $4000 less than previous mean of salaries.The median will stay same as before.How are mean and median affected if a value is changed to some other value?The median is the middle value of the sorted(ordered in ascending or descending way)data values. If value changed is not the middle value (if number of observations are odd) or is not changing the average of two mid values (if number of observations are even), then the median won't change as it does't care about the value of the data unless its about the mid value of the sorted data or average of mid values.
The mean is affected by the data.
The mean of n values is calculated as:
[tex]\overline{x} = \dfrac{x_1 + x_2 + ... + x_i + ... + x_n}{n}[/tex]
Suppose that x_i changed to y
Then we have then new mean as
[tex]\begin{aligned}\overline{x}_{new} &= \dfrac{x_1 + x_2 + ... + (x_i -x_i + y)+ ... + x_n}{n}\\&= \dfrac{x_1 + x_2 + ... + x_i+ ... + x_n}{n} + \dfrac{-x_i + y}{n}\\&= \overline{x} + \dfrac{y-x_i}{n}\\\end{aligned}[/tex]
For the given data, one value was changed from $40,000 to $20,000, thus, as $40,000 was lowest value of the data, thus median stays same as before,.
And for new mean, we have:
[tex]\overline{x}_{new} = \overline{x} + \dfrac{y-x_i}{n} = \overline{x} + \dfrac{-20000}{5}\\\\\overline{x}_{new} = \overline{x} -4000[/tex]
Thus, new mean salary will be $4000 less than the previous mean salary.
Learn more about mean versus median here:
https://brainly.com/question/14315366
Decreasing Valerie's salary will lower the mean salary of the teachers. The effect on the median depends on the other salaries, but if Valerie's salary was the minimum, the median may remain unchanged.
Decreasing Valerie's salary from $40,000 to $20,000 will affect both the mean and median salaries of the teachers in the school. To determine the impact on the mean salary, we would subtract the amount of the decrease from the total salaries and then divide by the number of teachers. Originally, if we assume the other four teachers earn salaries between $40,000 and $70,000, the total salary pool would be the sum of all five teachers' salaries. With Valerie’s decrease, the new total would be $20,000 less. Dividing this new total by 5 would give us the new mean salary.
As for the impact on the median salary, this depends on where Valerie's original salary of $40,000 stood in relation to the other four salaries. Since she was making the minimum amount within the provided salary range, if all other teachers make more than $40,000, Valerie's reduced salary will not change the median, as the median is the middle value when all salaries are listed in order. However, if Valerie's salary was at the median, her reduced salary would lower the median if the next lowest salary is less than $40,000.
WILL GIVE BRAINLIEST
An oil company fills 1 over 10 of a tank in 1 over 5 hour. At this rate, which expression can be used to determine how long will it take for the tank to fill completely?
1 over 5 ⋅ 10 hours
1 over 10 ⋅ 5 hours
1 over 5 ⋅ 1 over 10 hours
5 ⋅ 10 hours
Answer:
Option A. 1 over 5. 10 hours
Step-by-step explanation:
This question can be solved by the unitary method.
∵ Oil company fills [tex]\frac{1}{10}[/tex] of a tank in the time = [tex]\frac{1}{5}[/tex] hurs
∴ Full tank can be filled in the time = [tex]\frac{\frac{1}{5} }{\frac{1}{10} }[/tex] hours.
= [tex]\frac{1}{5}\times 10[/tex]
Therefore, the expression that can be used to determine the time that it will take to fill the tank completely will be Option A.
Michael has $1.95 totally in his collection, consisting of quarters and nickels. The number of nickels is three more than the number of quarters. How many nickels and how many quarters does Michael have?
Use the table to answer the question. House A $124,270 Annual appreciation 4% House B $114,270 Annual appreciation 5% In which of these years after it was purchased is the value of House A greater than the value of House B? Check all that apply. 7 8 9 10
(4k^4 + 2 - 3k) + (5k^4 + k - 8)
PLEASE HELP You have just applied, and have been approved for a $175,000 mortgage. The rate quoted to you by the lender is 5.5% for a 30 year fixed mortgage. Use the provided table to determine how much of your first month’s payment goes towards the principal.
a.
$191.92
c.
$187.32
b.
$190.23
d.
$184.88
To calculate the portion of the first month's payment that goes towards the principal, we need the monthly payment amount, which is calculated from the loan amount, interest rate, and term. From there, we subtract the first month's interest from the monthly payment. In the absence of adequate information or a mortgage calculator, we cannot provide the correct option from (a-d).
Explanation:To determine how much of the first month's payment goes towards the principal of a $175,000 mortgage at a rate of 5.5% for a 30-year fixed mortgage, we need to calculate the monthly payment and then separate the interest from the principal.
The monthly payment M can be calculated using the formula:
M = P x (r(1+r)^n) / ((1+r)^n-1)
Where:
Next, we find the monthly interest portion by multiplying the principal by the monthly interest rate and subtract it from the monthly payment to find how much goes towards the principal.
Unfortunately, the information given does not provide a clear way to calculate the exact monthly payment or the portion applied to the principal without additional information or a financial calculator. In practice, you would use a formula or a mortgage calculator to find the total monthly payment, and then deduct the first month's interest to determine the amount applied to the principal. Without the correct formula or values, we can't determine the answer options (a-d) provided.
Factor the monomial t^2-16t+48
Use the quadratic formula to solve, 2x^2=7x+6 Leave your answer in simplified radical form.
Please show all your work! (30 points)
Find the area of the following ellipse. a = 4.5 m; b = 5.5 m
Answer:
Area of ellipse is ≈ 77.78 [tex]m^{2}[/tex]
Step-by-step explanation:
Given the dimension of ellipse
a = 4.5 m
b = 5.5 m
Now, Area of ellipse = [tex]\pi ab[/tex]
= [tex]\frac{22}{7}\times 4.5\times 5.5[/tex]
= [tex]\frac{5445}{70}[/tex]
= 77.78 [tex]m^{2}[/tex]
Hence Area of ellipse will be 77.78 [tex]m^{2}[/tex]
The area of the ellipse is calculated using the formula A = ab, with the given semi-major axis of 4.5 m and semi-minor axis of 5.5 m, estimated to two significant figures as 78 m².
The area A of an ellipse with semi-major axis a and semi-minor axis b is given by the formula A = \ab. Given that a = 4.5 m and b = 5.5 m, we can calculate the area of the ellipse using a calculator. Keeping in mind that we should report our final answer to the same number of significant figures as the least precise measurement provided (which in this case is two significant figures), we have:
A = \(4.5 m)(5.5 m)
A = 3.1415927... × 24.75 m²
A = 77.66546225 m²
However, due to the significant figures rule our reported answer should be:
A = 78 m²
4(x-7)(x+6)=0
[tex]4(x - 7)(x + 6) = 0[/tex]
Answer:
Expanded: 4x² - 4x - 168 = 0
Solutions: x = -6, 7
Explanation:
If you need to expand the expression:
First, distribute the 4 to the binomial directly to its right but multiply each term within the parentheses by 4.
4(x - 7) = 4(x) + 4(-7) = 4x - 28
The new equation is (4x - 28)(x + 6) = 0
Next, we use the FOIL method. This is an acronym that instructs which terms in each binomial are multiplied together. It stands for Firsts, Outsides, Insides, and Lasts.
Firsts: 4x(x) = 4x²
Outsides: 4x(6) = 24x
Insides: -28(x) = -28x
Lasts: -28(6) = -168
Put them into one equation and combine like terms.
4x² + 24x - 28x - 168 = 0
4x² - 4x - 168 = 0
If you need solutions to the expression:
First, divide both sides of the equation of the 4 that was previous factored out.
4(x - 7)(x + 6) = 0
[4(x - 7)(x + 6)] / 4 = 0 / 4
(x - 7)(x + 6) = 0
Now, set each binomial equal to 0 and solve for x using whatever operations are necessary.
x - 7 = 0 x + 6 = 0
x - 7 + 7 = 0 + 7 x + 6 - 6 = 0 - 6
x + 0 = 7 x + 0 = - 6
x = 7 x = - 6
The solutions to the expression are x = -6, 7
If f(x) = 2x - 8 and g(x) = square root of x - 5, what is (f ^ g)(30).
The output of the function (f ^ g)(30) in this context refers to first calculating the output of the g function given x = 30, then substituting this output into the f function. With g(30) = sqrt(x - 5) and f(x) = 2x - 8, we find that (f ^ g)(30) = 2.
Explanation:To find (f ^ g)(30), we first need to find the output of the g function when x = 30 and then substitute this output into the f function. This is also known as the composition of functions.
First, let's find the output of the g function when x = 30. Given that g(x) = sqrt(x - 5), for x = 30, g(30) = sqrt(30 - 5) = sqrt(25) = 5.
Next, we substitute this output into the f function. Given that f(x) = 2x - 8, when x = 5, f(5) = 2(5) - 8 = 10 - 8 = 2.
Therefore, (f ^ g)(30) = 2.
Learn more about Composition of Functions here:https://brainly.com/question/30143914
#SPJ12
To find the value of [tex](f ^ g)(30)[/tex], substitute 30 into both f(x) and g(x) to find f(30) and g(30). Then substitute g(30) into f(x) to find the final value.
Explanation:In this mathematics question, you're asked to find the value of [tex](f ^ g)(30)[/tex]where [tex]f(x) = 2x - 8[/tex]and g(x) = square root of x - 5. To calculate (f ^ g)(x), we first need to find the value x in both functions f and g. So, let's find f(30) and g(30) first.
Firstly, substitute x = 30 into f(x). So, [tex]f(30) = 2*30 - 8 = 52[/tex]. Now, substitute x = 30 into g(x). So, g(30) = square root of (30 - 5) = square root of 25 = 5.
Now, f ^ g(30) means we substitute the output of g(30) = 5 into f(x) which gives us [tex]f(5) = 2*5 - 8 = 2.[/tex]
Learn more about Composite Functions here:https://brainly.com/question/30143914
#SPJ12
A cylindrical can of cat food has a diameter of 3.5 inches and a height of 1.25 inches. A second brand of cat food is packaged in a cylindrical can with a radius of 1.2 inches and a height of 1.25 inches. What is the difference between the volumes of the cans? Show your work.
Which statements correctly describe the solid figure? Check all that apply.
It is an octagonal prism.
It is an octahedron.
It is oblique.
It is a Platonic solid.
It is a convex polyhedron.
A number, half of that number, and one fifth of that number are added. The result is 51. What is the original number?
Final answer:
The original number is determined by setting up an algebraic equation based on the relationship given in the problem, solving for the variable, and using algebraic operations. The original number is found to be 30.
Explanation:
To find the original number when its half and fifth are added to it to get 51, we can set up an algebraic equation. Let's denote the original number as x. Half of that number would be x/2 and one fifth of that number would be x/5. The equation representing the given condition is:
x + x/2 + x/5 = 51
To solve this, we need a common denominator to combine the fractions:
Find the least common multiple (LCM) of 2 and 5, which is 10.Multiply the entire equation by 10 to clear the fractions: 10x + 5x + 2x = 510.Combine like terms: 17x = 510.Divide both sides by 17 to solve for x: x = 510 / 17, which simplifies to x = 30.Therefore, the original number is 30.
Choose the equation of a line in standard form that satisfies the given conditions. perpendicular to 4x + y = 8 through (4, 3) A. x − 4y = −8 B. x + 4y = 16 C. 4x − y = 11 D. 4x + y = 19
What is the formula for margin of error?
Answer:
ME=z×s/√n
Step-by-step explanation:
Basically the answer is C.
A metal bar weighs 8.18 ounces. 96% of the bar is silver.How many ounces of silver are in the bar?
In mathematics, a percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%",
Given that a metal bar weighs 8.18 ounces and 96% of the bar is silver.
The amount of Silver in the bar is
[tex] A=\frac{96}{100}(8.18) =7.8528 [/tex].
The amount of Silver in the bar in ounces is [tex] 7.8528\;ounces [/tex].