Paula conducts a study, recording the total distance a forest has advanced into a grassy valley. She uses this equation, where y is the number of years since Paula’s study began, and f is the total number of feet the forest has advanced.

f = 3y + 54

If the forest has advanced into the valley 90 feet, how many years have passed since Paula’s study began?

A. 12 years
B. 30 years
C. 270 years
D. 324 years

Question

Paula conducts a study, recording the total distance a forest has advanced into a grassy valley. She uses this equation, where y is the number of years since Paula’s study began, and f is the total number of feet the forest has advanced.

                      f = 3y + 54

If the forest has advanced into the valley 90 feet, how many years have passed since Paula’s study began?


A.	  12 years
B.	  30 years
C.	270 years
D.	324 years