The function \(f(x) = -30x + 390\) gives the predicted height above t…

Question

Prompt

The function

f (x) = - 30 x + 390

gives the predicted height above the ground

f (x)

, in feet, of a model airplane

x

minutes after it begins to descend. What is the predicted height above the ground, in feet, of the model airplane

3

minutes after it begins to descend?