I would say D the other answers seem wrong
Subtract what is to the right of the equal sign form both side of the equation but any way the answer is 0
Frequency describes the number of waves that pass a fixed place in a given amount of time.
Hmmm the object, is at rest, when dropped, so it has a velocity of 0 ft/s
the only force acting on the object, is gravity, using feet will then be -32ft/s²,
was wondering myself on -32 or 32.. but anyhow... we'll settle for the negative value, since it seems to be just a bit of convention issues
so, we'll do the integral to get v(t) then

when will it reach the ground level? let's set s(t) = 0

part B) check the picture below