A local restaurant earns $9,000 in a 4-hour period. The total amount of earning varies directly with the number of hours. Find the total earnings if the restaurant open for 9 hours.

step-by-step explanation:

mean or average is 40.6

6^2 or 36

step-by-step explanation:

6000n

6×1000n

6×10^3 n

so we need 6n need to be a perfect cube

so n has to be 6^2 so that 6n is 6^3

what i'm saying is if you let n be 6^2 you have 6^3×10^3 or 60^3 which is a perfect cube