The bike store marks up the wholesale (lower price) cost of all of the bikes they sell by 30%. 1. Andre wants to buy a bike that has a price tag of $125. What was the wholesale cost of this bike?

(Hint: the $125 is 130% of the original wholesale price)

2. If the bike is discounted by 20%, how much will Andre pay (before tax)?.

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.