Question 215185: a helicopter takes off from the roof of a building that is 200 ft above the ground. The altitude of the helicopter increases by 150 fet each second.
1. create an equation to express the altitude of a helicopter as a function of time.
2. calculate the altitude of the helicopter 90 seconds after take off.
3. How long does it take for the helicopter to reach 20,000 feet?
Thank you!
Debbi
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! a helicopter takes off from the roof of a building that is 200 ft above the ground. The altitude of the helicopter increases by 150 feet each second.
1. create an equation to express the altitude of a helicopter as a function of time.
h(t) = 150t + 200
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2. calculate the altitude of the helicopter 90 seconds after take off.
h(90) = 150*90 + 200 = 13700 ft.
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3. How long does it take for the helicopter to reach 20,000 feet?
20000 = 150t + 200
150t = 19800
t = 132 seconds
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Cheers,
Stan H.
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