A package of AA batteries cost 3.50 plus an additional 6% tax. What is the price after tax?

He answer would be $3.71

The batteries cost 3.50. We want to find out how much they cost after a 6 percent sales tax.

First take the percentage and change it into decimal form, then multiply with the original number like I've done below.

3.50 * 0.06 = 0.21

3.50 + 0.21 = 3.71

Then you simply add the amount to the original 3.50 to get $3.71 as your price after sales tax.