If a grocery mix 3 pounds of candy cost $1.07 per pound and 5 pounds of candy cost a $.90 per pound what should be the price of the mixture per pound

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.