SOLUTION: If a cannonball is fired with an upward velocity of 220 feet per second, at what times will it be at a height of 600 feet?

Question 857910: If a cannonball is fired with an upward velocity of 220 feet per second, at what times will it be at a height of 600 feet?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If a cannonball is fired with an upward velocity of 220 feet per second, at what times will it be at a height of 600 feet?
Note: Gravity is pulling it down at a rate of 16 ft/sec^2
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s(t) = -16t^2 +220t
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Solve:
-16t^2+220t = 600
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-16t^2 + 220t - 600 = 0
16t^2 - 220t + 600 = 0
4(4t -15)(t-10) = 0
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t = 3.75 seconds and t = 10 seconds
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Cheers,
Stan H.
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