anonymous
  • anonymous
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
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@Jamierox4ev3r
Vocaloid
  • Vocaloid
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) = ?
anonymous
  • anonymous
6-4=2 @Vocaloid

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More answers

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

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