Which Inter hers represents the total change in altitude of an airplane descending 5 feet every second for 15 seconds?
A. 65
B. 75
C. -75
D. -65
The total change in altitude of the airplane can be calculated by multiplying the rate of descent (which is -5 feet per second) by the time of descent (which is 15 seconds).
So, the answer would be:
Total change in altitude = rate of descent x time of descent
= (-5 feet per second) x (15 seconds)
= -75 feet
Therefore, the answer is option C. -75.