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OpenStudy (anonymous):
A pair of shoes costs $30.99 and the state sales tax is 5%. Use the formula C = p + rp to find the total cost of the shoes, where C is the total cost, p is the price, and r is the sales tax rate.
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OpenStudy (mathstudent55):
Use your formula. Replace p with 30.99, and replace r with 0.05. You use 0.05 because that is 5% written as a decimal. Then evaluate C.
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