Question

The height (in feet) of a rocket from ground level is given by the function f(t) = -16t² + 220t. What is the instantaneous velocity of the rocket 12 seconds after its launch?

Answer 1

-32t + 220

= -32(12) + 220

-384 + 220 =

-164

first step is to take the derivative. next is to plug in 12 into the function