The price was $172, and the sales tax rate was 7 percent. how much sales tax did nick pay when he bought the music player? . a. $7.20. b. $12.04. c. $12.45

I think it's B. Why?

7 equals 5 plus 2. 2 is 1 plus 1

So we need to find 1 percent and 5 percent

Now, 5 is half of 10, so we need to find 10 percent and divide it by two.

$172 divided by 10 is $17.20. 17.20 divided by 2 is $8.60

$8.60 s our 5 percent.

But we need to find 1 percent.

To get 1 percent from our 10 percent, we need to move our decimal a number to the left. So it would be $1.72 . And we need to find 2 percent. So we could either add 1.72 by itself or multiply it by two, which would be $3.44.

But like I said, we need 7 percent, so we add the 5 percent ($8.60) and 2 percent ($3.44) . The sum would be $12.04, which is B.

There :)