Michelle poured 7/8 cup of water from a pitcher into a glass. then she poured another 2/3 cup. what is the change in the amount of water in the pitcher?

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.

The answer to your question is b