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the height in feet of a flare t seconds after it is shot is modeled by h(t)= -16t2+92t+3.5 find its average speed from 1 to 3 seconds

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To do that, divide the distance traveled by the time elapsed.

h(1) = 79.5
h(3) = 135.5

so, avg speed is 56ft/2s = 28ft/s

Great.!!

he height in feet of a flare t seconds after it is shot is modeled by h(t)= -16t2+92t+3.5 find its average speed from 2 to 5 seconds

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