Which integer represents the total change in altitude of an airplane descending 5 feet every second for 15 (1 point) seconds?
65
75
-75
-65
The airplane is descending at a rate of 5 feet per second for 15 seconds.
Therefore, the total change in altitude can be calculated as:
Total change in altitude = rate of descent x time
Total change in altitude = 5 feet/second x 15 seconds
Total change in altitude = 75 feet
Since the airplane is descending, the total change in altitude has a negative value.
Therefore, the integer that represents the total change in altitude of the airplane is -75.
Hence, the answer is option C: -75.