The engine life for a certain brand of lawn mower is modeled by the function f(h) = 50 - 1 3 h where h represents hours used. what does the function mean?

Precalculus question, image attached.

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume