Answer:
5 hours
Explanation:
The problem is giving you the equation
y = 0.4x; where y is the # of buckets filled and x is the hours.
If they you 2 filled buckets, then how many hours?
You need to solve for x
y = 0.4x; to get the x by itself, divide by 0.4
x =
; now substitute y with 2 ( for 2 filled buckets)
x =
= 5; which means it took 5 hours to fill up 2 buckets.