Question

2

10 points
Mark launched his model rocket from the ground. As it flew, its height followed the path of the equation h (t) = -16t² + 180t, where the height, h, is in feet and the time, t, is
in seconds. How many seconds will it take the rocket to reach a height of 350 feet going
your answer to the nearest tenth.
up? Round
Just type the number. You do not need to include the units
Type your
in the answer.

Answer 1

Explanation:

h(t) = 350 ft = -16t^2 + 180t

0 = - 16t^2 + 180t - 350 Now use quadratic formula with

a = -16 b = 180 c = -350

to find t = 2.5s ( on the way UP) and 8.75 s ( on the way back down)