Question

An airplane is flying at 35000 feet above sea level. The airplane starts to descend at a rate of 2500 feet per minute. Let m be the number of minutes. Which of the following expression describe the height of the airplane after any given number of minutes?

Answer 1

Answer:

In this case, the airplane is flying at 35000 feet and descend 2500 feet every minute. That means the airplane descend rate is 2500 feet/min. Since the duration is m minute then you need to multiply it by the descending rate. Then the formula that can count the airplane height would be:

Airplane height:
35000feet - (2500feet/min x m min)
35000feet - 2500m feet