Question

A scientist dropped an object from height of 320 feet. The height of the object is modeled by the equation h=320 - 16t^2 . After how much time will the object hit the ground?

v/20 seconds

10 seconds

40 seconds

20 seconds

Answer 1

Answer:

√20

Step-by-step explanation:

hit the ground means h = 0

0 = 320 - 16t²

16t² = 320

t² = 320/16 = 20

t = √20