Backing a vehicle requires skillful use of the
a. gearshift lever.
b. clutch pedal.
c. turn signals.
d. brake pedal.

The bystander effect  for some reason my history teacher was talking about this 

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.