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Riley’s yogurt weighs 8.641 ounces. Sasha’s yogurt weighs 5.77 ounces. To pay a lower price, should Riley...

13. Riley’s yogurt weighs 8.641 ounces. Sasha’s yogurt weighs 5.77 ounces. To pay a lower price, should Riley and Sasha pay for their yogurt together or separately? Justify your answer.

Answer

Riley's yogurt weighs 8.641 ounces, which falls into the 5.001 to 10.0 ounces category, costing $3.89. Sasha's yogurt weighs 5.77 ounces, also falling into the 5.001 to 10.0 ounces category, costing $3.89. If they pay separately, the total cost is $3.89 + $3.89 = $7.78.

If they pay together, the combined weight is 8.641 + 5.77 = 14.411 ounces, which falls into the 10.001 to 15.0 ounces category, costing $5.29.

Therefore, Riley and Sasha should pay for their yogurt together to pay a lower price of $5.29 instead of $7.78.

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