Question

How long will it take for the ball to hit the ground?

Answer 1

This is the graph

Answer 2

the equation is f(x)=-32x^2+64x+40

Answer 3

the velocity is 64 and the distance is 40

Answer 4

@mhanifa

Answer 5

You need to find the time x, when f(x) = 0

Answer 6

how do i find it

Answer 7

-32x^2+64x+40 = 0
Solve this

Answer 8

You will get two roots. The positive root is your answer

Answer 9

huh i got this

Answer 10

What did you get?

Answer 11

-8(2x+1)(2x-5)

Answer 12

And the roots are?

Answer 13

idk

Answer 14

-8(2x+1)(2x-5) = 0
(2x+1)(2x-5) = 0

Answer 15

Can you solve each of the factors?

Answer 16

are the roots -1/2 and 5/2

Answer 17

so 5/2

Answer 18

Yes. You may want to make it a decimal

Answer 19

ok

Answer 20

wait so it will take the ball 2.5 seconds to hit the ground?

Answer 21

Yes, you got it!

Answer 22

thank you

Answer 23

You are welcome!