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CLEP

A science class launched a rocket from level ground. The height h, in feet, of the rocket above the ground t seconds after it was launched can be modeled by the function h left parenthesis t right parenthesis equals negative 16 t squared plus 64 t. How many seconds did it take for the rocket to return to the ground?

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bevelled 1 fourth

Correct Answer: 
No

bevelled 1 half

Correct Answer: 
No

2

Correct Answer: 
No

4

Correct Answer: 
Yes

8

Correct Answer: 
No