When a ball is thrown up into the air, the function h(t) = −16t2 + 72t
gives the height h
in feet of the ball t
seconds after it has been thrown. What does h(9)
represent? (1 point)
Responses
The height of the ball 9 seconds after it has been thrown.
The height of the ball 9 seconds after it has been thrown.
The time it takes the ball to reach its maximum point is 9 seconds.
The time it takes the ball to reach its maximum point is 9 seconds.
The ball took 9 seconds to hit the ground.
The ball took 9 seconds to hit the ground.
9 seconds
9 seconds
The height of the ball 9 seconds after it has been thrown.
The correct answer is: The height of the ball 9 seconds after it has been thrown.
The correct answer is "The height of the ball 9 seconds after it has been thrown."
To find the answer, we need to substitute the value of t=9 into the given equation h(t) = −16t^2 + 72t.
h(9) = -16(9)^2 + 72(9)
= -16(81) + 72(9)
= -1296 + 648
= -648
Therefore, h(9) represents the height of the ball 9 seconds after it has been thrown, which is -648 feet.