TIM B.

02/23/22

Computing a Margin of Error: Confidence Interval for a Population Mean

You measure 49 dogs' weights, and find they have a mean weight of 30 ounces. Assume the population standard deviation is 12.2 ounces.Based on this, what is the margin of error associated with a 90%... more

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Statistics

02/10/22

Two fair, six-sided dice are rolled. What is the probability that one die shows a 1 and the other die shows a 6?

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7th Grade Honors Math

02/09/22

What is an equation of the line that passes through the points (-4, -1) and (2, 8)?

Please help me. I can't understand this

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Physics

02/04/22

Find the gauge pressure (in psi) at the bottom of a freshwater swimming pool that is 15.5 ft deep.

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Calculus Precalculus

01/10/22

What even is a slope?

I imagine slope as the steepness of a line which means that it should probably tell us an angle which the line makes with the positive x axis .But we get a number .WTH does that even mean? What am... more

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Physics

12/13/21

Which of the following is equivalent formula to r = d/t

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Statistics

12/04/21

What is the formula for calculating this?

X follows a beta distribution with parameters alpha=5 and beta=2. What is V(X)?

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Calculus

12/01/21

Find the least squares regression line

Find the least squares regression line for the given points. (-2,-2), (-1,-1), (0,0), (1,3), (2,3)

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Differential Equations

11/21/21

Take the Laplace transform of the IVP

-4 dy/dt - y = 0 y(0) = -8I need to use Y for laplace transform of y( ) = Y{0}So Y = ( ) / (s - )I found that y(t) = -8e^(-t/4)

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Mathematics

11/17/21

If the base is 10 then the given logarithm is a natural logarithm.

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Calculus

11/11/21

Find the area of the region under the curve y=7-4x^2 and above the x-axis

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Math Physics

11/09/21

Calculate the force needed.

A cement lorry with a mass of 15000kg takes 25s to accelerate from 5.0ms-1 to 22ms-1. Calculate the force needed to do his.

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Logarithm

11/06/21

Logarithm equations

Solve log base 3(2x +5)-log base 4 x =3

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Statistics

11/03/21

Express the confidence interval 30.9 % ± 7.7 % in interval form.

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Chemistry

11/02/21

AP CHEMISTRY GAS LAWS

If 3.21 Moles of ammonia gas occupy 5.22 L at 50 degrees C, calculate the pressure of the gas using the ideal gas equation and by using the van der Waals equation. Compare each value to the actual... more

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Thermodynamics

10/28/21

heat engines thermodynamics

What is the entropy change of a gas in J/K (to 2 decimal points) when one mole of a perfect gas reversibly expands from 0.36 m3 to 2.42 m3?

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Calculus

10/24/21

Maxima and Minima

Let f(x) = e2x-4x^2-7 The derivative of f is f'(x) = _________An equation for the tangent line to the curve y = f(x) at x = 0 is y = ____________

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Calculus

10/19/21

Mean Value Theorem

Consider the function f(x)=1/x on the interval [3,12]. Find the average or mean slope of the function on this interval. By the Mean Value Theorem, we know there exists a c in the open... more

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Statistics

10/18/21

Find the area under the standard normal curve which lies

A. to the left of 0.47 b) to the right of z = -0.06 ( c) to the right of z = 2.53d) to the left of z = -1.31 (e) between z = 0.72 and z = 1.59 (f) between z = -0.11 and z = 2.48

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Calculus

10/18/21