SOLUTION: The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 23 minutes requires 4.6 gallons of water. Find

Question 133757: The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 23 minutes requires 4.6 gallons of water. Find the amount of water used in a shower lasting 4 minutes.

Found 2 solutions by SoOoDumb, Earlsdon:
Answer by SoOoDumb(14) (Show Source): You can put this solution on YOUR website!

X = number of gallons in 4 minutes
Cross multiply

Divide both sides by 23

In 4 minutes, you would use gallons of water.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
First, from the problem description, you can write:
where W is the amount of water used in time, t. k is the constant of variation. Now substitute the given values of W (4.6 gallons) and t (23 minutes) to find the value of k.
Divide both sides by 23.

so now the equation for this problem is:
Substitute t = 4 minutes to find the amount of water, W.

gallons.
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