Question

An airplane at cruising altitude starts descending for a landing. The function f (t) = 33,600 – 1500t describes its altitude t minutes after starting its descent. What is the airplane's altitude after 10 minutes?

Answer 1

ANSWER

18,600

EXPLANATION

The function that describes the altitude of the plane t minutes after starting its descent is

$f(t) = 33600 - 1500t$

To find the airplane's altitude after 10 minutes, we substitute t=10 into the function.

$f(10) = 33600 - 1500(10)$

$f(10) = 33600 - 15000$

$f(10) = 18600$

Therefore the airplane's altitude after 10 minutes is 18,600 units.