The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 50 g |
45¢ |
70¢ |
Every additional 10 g |
15¢ |
30¢ |
Caden paid $4.45 for posting a package locally. What was the greatest possible mass of the package that Caden posted?
$1 = 100¢
$4.45 = 4.45 x 100 = 445¢
Amount that Caden paid for the additional sets of 10 g for the local package
= 445 - 45
= 400¢
Number of sets of 10 g that Caden paid for the local package
= 400 ÷ 10
= 40
Mass of 40 sets of 10 g for the local package
= 40 x 10
= 400 g
Greatest possible mass of the local package
= 50 + 400
= 450 g
Answer(s): 450 g