14. zach needs a new pair of running shoes.
the pair that he wants regularly sells for
$129. if they are on sale for 24% off, how
much will he pay in total if sales tax is 6.4%?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.