Melanie and brad each drink 10 cups of water every day. lara drinks 3 quarts of water every day. how many gallons of water do the three of them drink altogether each week?

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.