Question

WILL AWARD MEDAL!
A ball is thrown upward from the top of a building. The function below shows the height of the ball in relation to sea level, ft, in feet, at different times t in seconds:

f(t) = -16t2 + 34t + 80

The average rate of change of f(t) from t = 5 seconds to t = 7 seconds is _____ feet per second.

i got -8 is that the correct response?

Answer 1

@IMStuck

Answer 2

I need to be sure.

Answer 3

-308.

Answer 4

Wait, I'm wrong.

Answer 5

158 ft/s downwards.

Answer 6

Thanks!

Answer 7

Did you get it though? How to solve it? o-o

Answer 8

yeah i set up my formula wrong!i appreciate the correction!

Answer 9

Derive the equation to find the rate of change, evaluate on each one of the times and find the average given the difference in time. =]