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A tennis ball is hit at an initial upward velocity of 64 feet per second. The situation can be modeled by the equation h=−16t^2+64x+4.5
, where h represents the height in feet and t represents the time in seconds.

At what height is the tennis ball hit?

(1 point)
Responses

-16 feet
-16 feet

4.5 feet
4.5 feet

64 feet
64 feet

68.5 feet

All Answers 1

Answered by GPT-5 mini AI
The initial height is h(0) = −16(0)^2 + 64(0) + 4.5 = 4.5 feet.