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Help me pleaseeeeeeeeeeeeee!!!!

Help me pleaseeeeeeeeeeeeee!!!!-example-1
User Binder
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1 Answer

3 votes

Answer:

3 seconds

Explanation:

h = -16t² + 48t

When h = 0, the height of the rocket is 0, so the rocket is on the ground.

0 = -16t² + 48t

Switch sides.

-16t² + 48t = 0

Factor the left side.

-16t(t - 3) = 0

-16t = 0 or t - 3 = 0

t = 0 or t = 3

The rocket is at zero height at t = 0 since that is the time that it is launched just before it lifts off the ground. Then it is again at zero height after 3 seconds because that is when it hits the ground after having been launched.

Answer: 3 seconds

User Inquiring Minds
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