Karen mails 3 packages that weigh 7.2, 7.5, and 7.9 pounds. The post office rounds the weight to the nearest pound. It costs $3 to mail 7 pounds and $3.75 for 8. How much did she pay to ship each? She has $10.25 in cash.

First you need to round each of the 3 packages to the nearest pound:

7.2 rounds to 7 pounds = $3.00 to ship

7.5 rounds to 8 pounds = $3.75 to ship

7.9 rounds to 8 pounds = $3.75 to ship

She has one package that would be $3 and two packages that are $3.75 each. Now you just need to add them up. 3 + 3.75 + 3.75 = $10.50 to ship all.

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