1 answer
(click or scroll down)
To find the height of the ball after 7.5 seconds, we need to plug in 7.5 for s in the equation h(s) = -s^2 + 10s + 3.
h(7.5) = -(7.5)^2 + 10(7.5) + 3
= -56.25 + 75 + 3
= 21.75
Therefore, the height of the ball after 7.5 seconds is 21.75. The correct answer is 21.75.