Posted by anonymous on Saturday, September 22, 2007 at 10:06am.
An airplane flying at an altitude of 31,000 feet descends at a rate of 1,200 feet per minute. If the plane descends for 15 minutes, what would its altitude be in feet?: *
13,000
23,000
18,000
21,000

math (altitude)  drwls, Saturday, September 22, 2007 at 11:19am
Calculate how far it falls in 15 minutes and subtract that from the original altitude

math (altitude)  saj, Thursday, March 8, 2012 at 6:54pm
1200*15 = 18,000
31,000  18,000 = 13,000 ft.
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