Home > CAAC > Chapter 4 > Lesson 4.1.5 > Problem 4-48
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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