Question

To mail a letter, it costs $0.48 for the first ounce, then $0.20 for each ounce thereafter. Find the cost to mail a letter that weighs 4.95 ounces.

Answer 1

2.23

Explanation:

0.48 for the first ounce, and then 0.20 for the rest.

0.48 + (0.20 x 3) = 1.08

.95 ounces? We round that to 1.00 ounces.

1.08 + 1 = 2.08 BUT

It's .95, isn't it? We need to do another part.

.95 divided by 0.20 (the ounces by the cost) = 4.75

You need to convert the 4.75 to a fraction, so 4.75 becomes 4 3/4.

subtract the missing amount (to make the fraction equal to 1) from the cost, so

1/4 of 0.20 is 0.5. Subtract 0.5 from 0.20 makes it 0.15.

Finally, add the costs.

2.08 + 0.15 = 2.23.