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Mathematics 16 Online
OpenStudy (anonymous):

The altitude of an airplane is decreasing at a rate of 40 feet per second. What is the change in altitude of the airplane over a period of 39 seconds?

OpenStudy (anonymous):

Rate = 40 feet per second Time = 39 seconds. So, altitude change = 40 * 39 = 1560 feet

OpenStudy (anonymous):

Am I right?

OpenStudy (turingtest):

perhaps they want -1560 is the only other possibility I see

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