<PRE><B>Question 491698</B>
If the equation describing the motion of a rocket is h(t)=10+5t^2, find its average speed during the first 5.0 seconds 
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Average speed = total distance/total time
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Height at t= 0 is 10 ft
Height at t= 5 = 10+5*25 = 135 ft
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Average speed = (135-10)/(5-0) = 125/5 = 25 ft. per second
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Cheers,
Stan H.</PRE>