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# Discount Percentages

SATMAT-11LDYE

The regular price of a jacket is $R$ dollars. This price is discounted by $a$ "percent off" of the regular price. If sales tax, which is $b$ percent of the selling price, is added on, then the total amount paid for the jacket is given by the equation:

$$T = \left[ \left( R \right) \left( 1 - \frac { a }{ 100 } \right) \left( 1 + \frac { b }{ 100 } \right) \right]$$

Which is a true statement about the variable $a$? (No Calculator)

A

$a$ represents the amount of the discount before tax is applied.

B

$100-a$ percent of the regular price is the selling price.

C

$a$ percent of the regular price is the selling price.

D

$a$ is the amount of the discount after tax has been applied.