posted by Anonymous .
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
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