The tax rate as a percent, r, charged on an item can be determined using the formula – 1 = r, where c is the final cost of the item and p is the price of the item before tax. louise rewrites the equation to solve for the final cost of the item: c = p(1 + ). what is the final cost of a $40 item after an 8% tax is applied?

The correct answer is:

$43.20

Explanation:

The formula we have is

c = p(1+r), where c is the total cost, p is the price of the item before tax, and r is the tax rate written as a decimal.  This formula comes from the fact that adding a percent tax to the cost of an item takes 100% of the price and adds r% to it; this is why we multiply the price by (1+r).

Since our tax rate is 8%, r = 8% = 8/100 = 0.08.  The price of the item is $40.  Using this information, we have:

c = 40(1.08) = $43.20

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this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.