A particle moves along a line so that at time t, where 0 is less or equal to t less or equal to pi, its position is given by s(t) = -4cos(t)- (t^2/2) + 10. What is the velocity of the particle when its acceleration is zero?

Answer such tools are fail proof;

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.   

Option b is correct. the violation of society's formally enacted criminal law