Final answer:
To find the cost of the paint including tax, multiply the cost of the paint by the tax rate and add the result to the cost of the paint. Rounding to the nearest cent, the cost of the paint (including 13% tax) is approximately $40.23.
Step-by-step explanation:
To find the cost of the paint including tax, we first need to calculate the tax amount. The tax rate is 13%, so we can find the amount of tax by multiplying 13% by the cost of the paint:
Tax = 0.13 * $35.60 = $4.628
The total cost of the paint including tax can be found by adding the cost of the paint and the tax amount:
Total cost = $35.60 + $4.628 = $40.228
Rounding to the nearest cent, the cost of the paint (including 13% tax) is approximately $40.23, which is closest to option b) $40.30.