Recent content by kylebutler

Thanks A LOT! How did I not think of that? :-)

Homework Statement z = 2, P(Z=z)=1/6 z = 3, P(Z=z)=1/6 z = 5, P(Z=z)=1/6 z = 7, P(Z=z)= x z = 11, P(Z=z)= y I'm supposed to find x and y given that E(Z)= 5+2/3 I have no idea how to do this. All I got is 7x+11x=4 but I can't solve this

the answer in the book clearly states "3 and 3/4 units^2". If the answer is wrong than that's pretty awful, since it was the first problem. Other answers seem fine. Thanks for your help though. If you don't mind another question I have is Find the exact value of the are of the region bounded...

I apologize, I meant x=1 and x=4 and I deleted all the dash (there was just one)

Question: Find the exact value of the are of the region bounded by: x^3, the x-axis and x=1 and x=4 Answer is 3.75 I tried finding the anti derivative so 1/4(x)^4, and therefore I've got 1/4(4)^4 - 1/4, which isn't the correct answer