Seth bought a t-shirt that costs $21.00. if the tax rate was 8%, what was the total cost of the t-shirt?

22.68

Step-by-step explanation:

The first step is to find the amount of tax

tax = original cost * tax rate

       = 21 * 8%

       = 21 * .08

      =1.68

Then we add the tax to the original cost to find the total cost

total cost = original cost + tax

               = 21 + 1.68

               =22.68

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