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Home > AC > Chapter 4 > Lesson 4.1.5 > Problem 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.

 Number of Letters 

 Cost of Stamps 

First set up the proportion.

What did you multiply by to get ?

letters for

Multiply by 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.
Click the link at right for the full version of the eTool: 4-48 HW eTool (Desmos)