an airplane 30,000 feet above the ground begins descending at the rate of 2000 feet per minute. assume the plane continues at the same rate of descent.

Question

A.write an equation to model the situation.

B.find the altitude of the plane after 5 minutes.

Answer 1

f = feet above ground

r = rate of descent

m = minutes

 

f = 30000 - r · m

f = 30000 - 20000m

 

After five minutes:

 

f = 30000 - 2000(5)

f = 30000 - 10000

f = 20000

 

After five minutes the plane is at 10,000. feet.