Question

In 2012, five U.S. Postal stamps cost $2.20. How much did seven stamps cost? (Hint, find the unit rate first) $

Answer 1

$3.08 for 7 stamps

Explanation:

The unit rate (price per stamp) is:

$2.20

-------------- = $0.44/stamp

5 stamps

Then 7 stamps would cost:

$0.44

------------ * 7 stamps = $3.08 for 7 stamps

1 stamp