Question 605461
A toy rocket is launched from a building 148 feet tall at an initial velocity of 222 feet per second. 
(a)give the function that describes the height of the rocket 
in terms of time t.
h(t) = -16t^2 + 222t + 148
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(b) determine the time at which the rocket reaches its maximum height, 
and the maximum height in feet
Vertex at time = -b/(2a) = -222/(2*-16) = 6.9375 seconds
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(c) for what time intercal will the rocket be more than 834 feet 
above ground level?
Solve -16t^2+222t+148 = 834
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(d) after how many seconds will it hit the ground?
Solve -16t^2+222t+148 = 0
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Cheers,
Stan H.