Question

Help mee ! Giving 40 pts !!

Answer 1

Explanation:

When the ball strikes the ground

height = 0

So: 0 = - 4.9 t^2 + 9.31 t + 239.12

Now use the Quadratic Formula with

a = - 4.9 b = 9.31 c = 239.12

to find t = 8 seconds