The height h (in feet) of an object shot into the air from a tall building is given by the function h(t) = 640 + 80t - 16t2, where t is the time elapsed in seconds.
a. Write a formula for the velocity of the object as a function of time t.
b. What should be the velocity of the object when it reaches its highest point?
c. When does this occur?
d. What is the maximum height reached by the object?
e. Write a formula for the acceleration of the object as a function of time t.