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Help with this question pls

Help with this question pls-example-1
User Wootiae
by
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1 Answer

1 vote

Answer: 9 s

Explanation:

Given:

h(t) = -16t² + 144t

Find:

time when h=0 They want to know when the rocket hits the ground. This happens when h=0

Solution:

0 = -16t² + 144t >Take out Greatest Common Factor

0 = (-16t )(t - 9) >Set each parenthesis = 0

(-16t ) = 0 and (t - 9)=0 >Solve for t

t = 0 and t = 9 >When the rocket launches t=0 and h=0

Also, t=9 when h=0

t=9 s

User Diogenes Creosote
by
7.8k points

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