Question 1190266
A helicopter takes off from the roof of a building that is 225 feet above the ground. The altitude of the helicopter increases by 200 feet each minute.
(a) Use a formula to express the altitude of a helicopter as a function of time. (Let t be the time in minutes since takeoff and A the altitude in feet.)
225+200t I know already got this But, I'm struggling to understand do we plug in the 90 seconds on here? I'm simply lost.
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A = 225 + 200t is correct.
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(b) Express using functional notation the altitude of the helicopter 90 seconds after takeoff.
Calculate that value. (Round your answer to the nearest foot.)
90 seconds = 1.5 minutes
A = 225 + 200*1.5 = 525 feet