John bought a pair of basketball shoes for $70. The sales tax on the shoes was $5.60. Which represents the sales tax rate? Group of answer choices

12.5%

.08%

9%

8%
which one?

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%