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  • Normal distribution with change of variables

    Temperatures in August are distributed normally with a mean of75 degrees and variance of 16 degrees squared. Using the change ofvariables technique, find the pdfof temperature measured inCelsius.F = 9/5 C + 32is the relation between Farenheitand Celsius

  • Geometry

    Explain why any complex number u with |u|=1 can be written in the form cos theta + i sin theta for some angle theta, and conclude that multiplication by u rotates thepoint 1 ( and hence the whole plane) through the angle theta

  • Integration

    What is the integral of f(x) between limits 1 and 2Where f(x) = (x^2 - x + 1) / xThank you.

  • solve the initial value problems using the method of Laplace transforms...

    y' + y = g(t) y(0)=1 g(t)={1, 0<x<12, x>1

  • Central Limit Theorom and Confidence Intervals

    Give the notation for the Central Limit Theorom and explain each symbol in it, and then carefully explain its connection with confidence intervals, and with hypothesistesting

  • Stats Homework

    An insurance company, based on past experience, estimates the mean damage for a natural disaster in its area is $ 5,000. After introducing several plans to preventloss, it randomly samples 200 policyholders and finds the mean amount per claim was $ 4,800 with a standard deviation of $ 1,300.Use the .05 significance level.1. What is the population in this case? What is the sample? How big is the sample?2. State your null and alternative hypotheses.3. What kind of tests do you plan to use? Why?4. Calculate the required test statistics and find the p-value associated with it.5. Do you reject Ho or accept Ha ? Why?6. Does it appear the prevention plans were effective in reducing the mean amount of a claim?What should the insurance company do?

  • Antiderivatives

    The question is: Since raindrops grow as they fall, their surfacearea increases and therefore the resistance to their fallingincreases. A raindrop has an initialdownward velocity of 10m/s andits downward acceleration isa=9-0.9tif0if t > 10If the raindrop is initially 500m above the ground, how longdoes it take to fall?

  • 10

    find the tangent line of the curve y=1/2 at x=2

  • math

    Let Qo: R^2->R^2 be a reflection in the Xaxis,let Q1:R^2->R^2 be reflection in the line y=x,let Q-1:R^2-.R^2 be a reflection in the line y=x,and letRpi/2:R^->R^2 be counterclockwise rotation through pi/2 show that Q1 o Rpi/2 =Qo and show that Rpi/2 o Qo= Q1

  • Discre

  • equation

  • transformations

    graph it..y=-1/2f(1/2x+1)-1write all transformations step....

  • Equation of a Conic Section

    Will ratelifesaver if correct!

  • angular velocity 3

    find the radius of a circle, to the nearest whole number, when the arc is 32 inches and the central angle is π.

  • Find general solution of each reducible second order differential equasions.

    y''=(x+y')2Anyone who can help me figure this out is a lifesaver.

  • area and distance under a curve using midpoints

    The velocity graph of a car accelerating from rest to a speed of60 km/h over a period of 30 seconds isshown. Estimate the distance, d traveled duringthisperiod. (Use M6 to get the most preciseestimate. Round the answer to two decimal places.)d = kma = 20

  • Cylindrical Coordinate Proof

    Using the cylindrical coordinate system, prove that(a) ?f + ? × [az ln(r)] = 0(b) ?[ln(r)] - ? × (az f ) = 0az is the unit vector in the z direction same as unit vector 'k' in some bookslike --> i + j + k = ax + ay + az

  • The Municipal Transit Authority serves 151,000 commuters daily when the fare is $1.97. Market...

    The Municipal Transit Authority serves 151,000 commuters daily when the fare is $1.97. Market research has determined that every penny decrease in the fare will resultin 1,150 new riders. What fare will maximize revenue?

  • nonlinear differential equation

    I know that there is some kind ofsubstitution involved but I have no idea where to start.


    Use partial fraction decompisition to find the inverse Laplacetransform.F(s) =