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 + 32t + 90 The average rate of change of f(t) from t = 4 seconds to t = 6 seconds is _____ feet per second.

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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 + 32t + 90 The average rate of change of f(t) from t = 4 seconds to t = 6 seconds is _____ feet per second.

Mathematics
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we'll be using the formula for average rate of change [f(6)-f(4)] / (6-4) so, first start by finding f(6)-f(4) = ?
6-4=2 @Vocaloid

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Other answers:

not quite f(t) = -16t^2 + 32t + 90 f(6) = ?
oh!! 90? @Vocaloid
almost, but not quite... t = 6 -16t^2 = ?
^ means exponent
whoops i wrote it down wrong on my paper hold on @Vocaloid
i got 858? @Vocaloid
forgot the negative ugh hold on
-294**** @Vocaloid
good, so f(6) = -294 now find f(4)
how do i do that?
using the same method you just did, just set t = 4 instead of 6
okay hold on
good, now plug everything back into our formula {f(6)-f(4)] / (6-4)
so -294+38? @Vocaloid
that's part of it the numerator is f(6) - f(4) = -294+38 and the denominator is (6-4) so divide the numerator by the denominator
so -256/2?
yes
-128?
is that right?
yup
so the final answer is -128?
yes
AWESOME THANK YOU SO MUCH, how do i give u a medal? @Vocaloid
click "best response" next to my name thanks, I'm glad I could be of service
never mind got it!
thanks so much honesttly !

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