Irun through hills. i veer around mountains. i leap over rivers. and crawl through the forests. step out your door to find me. what am i ? ?

Hello

There are quite a variety of animals that fix your explanation, but the most common one is a squirrel. A squirrel fits your description, except i'm not sure about the jumping over a river. I believe for that, it might also be a stray cat.

See diagram.we use washers to get the area and we will be integrating with respect to xouter radius is the  distance between y = e^x and y = -1    inner radius of washer is the distance between y = 1 and y = -1    the area of one cross-section of a washer is    solid lies between x = 0 and x = 2. the volume is    if you need this expanded, then    the question doesn't say to evaluate, so we're done.   

Answernormal with a mean of $5.25 and a standard error of $0.28