Question

an airplane has an initial altitude of 3000 feet and descends at a rate of 400 ft/min. the aircrafts altitude after t minutes is given by the equation a = 3000 - 400t. a) use the equation to determine the planes altitude after 5 minutes.

Explanation:

Step1: Identify the given values

We have the equation $A = 3000-400t$, where $t = 5$ minutes.

Step2: Substitute the value of t

Substitute $t = 5$ into the equation $A=3000 - 400t$. So $A=3000-400\times5$.

Step3: Perform the calculation

First, calculate $400\times5 = 2000$. Then $A=3000 - 2000$. So $A = 1000$.

Answer:

1000