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4-48.

Mr. Wallis decided to create another table to figure out how much it costs to send a certain number of regular letters through the mail. Use proportional reasoning to complete his table below. 4-48 HW eTool (Desmos). Homework Help ✎

Number of Letters

Cost of Stamps

10

$3.40

2

$0.68

$5.10

7

1

500

$14.28

First set up the proportion.

What did you multiply 0.68 by to get 5.10?

7.5

15 letters for $5.10

Multiply 2 by 7.5 to get the number of letters. Repeat this strategy for all of the blanks within the table.

Use the eTool below to help you with this problem.
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