please help and make sure all the answers and work is right

Algebra
Tutor: None Selected Time limit: 1 Day

Mar 4th, 2015

Volume of sandbox cube=9×6×3=162ft^3

1 bag of sand=$3.50 for 3 ft^3

For 162 ft^3 ,price=162*3.50/3

          =$189 with free delivery


Second case, 1 bag of sand=$22 /yd^3

            For 162 ft^3=6 yard^3

           For 6  yard^3 ,price=6*22=$132 with $20 delivery fee

total=132+20=$152

Hence the second option is better and less expensive

Mar 4th, 2015

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