High interest rates make it difficult for people to pay off credit card debt in a reasonable period of time. The interest I (in dollars) paid on a $10,000 debt over 3 years when the interest rate is r% can be approximated by the equation shown below.

I

175.393

+ 0.663 = r

If the credit card interest rate is 15.6%, find the amount of interest paid during the 3 years.

I = $