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6-71) Maya wants to make a table cloth that measures 5 feet wide and 6 feet long.  If the fabric she wants costs \$3 per square yard, how much does Maya need to pay for the fabric?  Assume no fabric is wasted.

6-72)  A bicycle that costs \$120 is now on sale at 20% off.  If sales tax is 8%, what is the final cost of this bicycle including sales tax?

6-73) Tennis shoes have a "buy one pair and get the 2nd pair for half the price" sale.  If the original price for one pair is \$80, and sales tax is 7.5%, how much does a customer pay for two pairs of tennis shoes?

6-74) Kaley made a rectangular vegetable bed that measures 4 feet by 6 feet.  Then she increased both its width and length by 20%.  How much has the bed's area increased in percentage?

6-75) If the diameter of a circle increases by 10%, how much does its area increase?

6-76) If the sides of a square increase by 1/3, how much does its area increase? Express your answer in a fraction.

6-77) If the sides of a cube increases by 10%, how much does its volume increase?

6-78) If the diameter of a cylinder increases by 10%, how much does its volume increase?

6-79) What is 75% of 1/4? Express your answer in a fraction.

6-80) What is 1/3 of negative 50%? Express your answer in a fraction.

More challenging math problems for 6th grade:
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