A recipe for cookies uses ½ cup of sugar for every 1 cup of flour. How much flour would you need to add to 1 ¾ cups of sugar so that the cookies taste the same?

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.