A survey is conducted in two cities. In Detroit, a sample of 48 people finds that they have an average age of 38.5 years with a standard deviation of 10.3 years. In Phoenix, a sample of 55 people finding average age of 43.7 with a standard deviation of 12.1 years. Find the mean Is there a deviation of the sample distribution

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.