Question

Monique is punting a football and the height the ball travels is a function of time. The function
h (s) = -s + 10s + 3 gives the height of the ball, h (s), given the number of seconds, s, that the
ball has been in the air. After flying through the air for 7.5 seconds, what is the height of the ball? Find h (7.5). (1 point)
• 134.25
• 21.75
21.5
• 24

Answer 1

The intended function is h(s) = −s^2 + 10s + 3. Substitute s = 7.5:

h(7.5) = −(7.5)^2 + 10(7.5) + 3 = −56.25 + 75 + 3 = 21.75.

So the height is 21.75 (the second option).