Answer:
To find the sales tax multiply the purchase price by the sales tax rate. Remember to convert the sales tax rate from a percent to a decimal number. Once the sales tax is calculated, it is added to the purchase price. The result is the total cost—this is what the customer pays.
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Solving Sales Tax
I think it’s c,, sorry if it’s wrong.
I'm pretty sure the answer is:
a. they receive a score of 3 or higher on the AP exam in the subject covered by the course