Section C Section C Checkpoint

Problem 1

Han’s father uses a credit card to buy a suitcase that costs $143. If he does not pay it off by the end of the month, the credit card company will add 2% interest to his bill.

How much will the suitcase cost him with interest? Explain or show your reasoning.

Show Solution
Solution

$145.86. Sample reasoning:

  • 2% of 143 is 2.86, and 143+2.86=145.86143 + 2.86 = 145.86
  • 143⋅1.02=145.86143 \boldcdot 1.02 = 145.86
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Sample Response

$145.86. Sample reasoning:

  • 2% of 143 is 2.86, and 143+2.86=145.86143 + 2.86 = 145.86
  • 143⋅1.02=145.86143 \boldcdot 1.02 = 145.86

Problem 2

A package is supposed to contain 17.6 ounces. A worker weighs it and finds that it only contains 16.5 ounces. What is the percent error?
A
6.25%6.25\%
B
6.6‾%6.\overline{6}\%
C
93.75%93.75\%
D
106.6‾%106.\overline{6}\%
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Solution
6.25%6.25\%
Show Sample Response
Sample Response
6.25%6.25\%