After descending for 8 minutes, an airplane is at an altitude of 24800 feet. after 20 minutes, the plane's altitude is 12800 feet. assuming a linear function, write an equation in the form a(t)=mt+b that shows the altitude, a, after t minutes of descent.

The equation form is,    

Step-by-step explanation:

Given : After descending for 8 minutes, an airplane is at an altitude of 24800 feet. After 20 minutes, the plane's altitude is 12800 feet.

To find : Write an equation in the form a(t)=mt+b that shows the altitude, a, after t minutes of descent ?

Solution :

The equation is in form,

Where, 't' is the time in minutes and 'a' is the altitude,

After descending for 8 minutes, an airplane is at an altitude of 24800 feet.

i.e. a=24800 and t=8

Substitute in the equation,

......(1)

After 20 minutes, the plane's altitude is 12800 feet.

i.e. a=12800 and t=20

Substitute in the equation,

......(2)

Solving (1) and (2) by subtracting them,

Substitute in equation (1),

So, The equation form is,

answer: h

step-by-step explanation: