I just had my calculus test and one problem that just seemed to not make any sense was this:

Find the velocity and acceleration of the body when the velocity equals 3. The given interval was $0 \leq t \leq 5$ the equation was $s=179 - 16t^2$ the only thing I could think to do was to find the derivative of s for velocity then find the derivative of velocity for acceleration and plug 3 in for t though that doesn't make much sense does it