(adsbygoogle = window.adsbygoogle || []).push({}); A coin is dropped from a height of 750 feet. The height,s, (measured in feet), at time,t(measured in seconds), is given bys= -16t^{2}+ 750.

a) Find the average velocity on the interval [1, 3].

b) Find the instantaneous velocity whent= 3.

c) How long does it take for the coin to hit the ground?

d) Find the velocity of the coin when it hits the ground.

For (a), I graphed the equation on my calculator and found y = 686 when x = 2 (the average of 1 and 3). I don't know if that's the right thing to do though.

For (b), I simply pluggedt= 3 into the equation given and got 606. Again, I don't know if that's the right thing to do.

For (c), I found when y = 0, x was 6.84. That doesn't seem like a logical time though.

I wasn't quite sure how to do (d), and I have the sneaking suspicion I'm not doing any of these right. Any help with any of the sections is appreciated!!

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# Homework Help: Calculus and Physics with Velocity

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