Problema Solution
2. Ken mails three packages at the post office that weigh 8.1, 8.5, and 8.9 pounds. The post office that Ken uses rounds the weight of a package to the nearest pound to determine the price of shipment. It costs $2 to mail a package that weighs 8 pounds and $2.75 for packages that weigh 9 pounds.
(a) How much did Ken pay to ship each package?
(b) Ken has $7.25 in his wallet in cash. Use subtraction to determine whether Ken has enough to mail the three packages and how much extra money he has or needs
Answer provided by our tutors
(a) How much did Ken pay to ship each package?
8.1 = 8 rounded to the nearest pound
For the 8.1 pounds package Ken paid $2.
8.5 = 9 rounded to the nearest pound
For the 8.5 pounds package Ken paid $2.75.
8.9 = 9 rounded to the nearest pound
For the 8.9 pounds package Ken paid $2.75.
(b) Ken has $7.25 in his wallet in cash. Use subtraction to determine whether Ken has enough to mail the three packages and how much extra money he has or needs
7.25 - (2 + 2.75 + 2.75) = 7.25 - 7.50 = - 0.25
Ken needs $0.25 extra money to mall the three packages.