Your uncle lives 20 miles away. So far, your family has driven 6 miles toward your uncle's house. How much farther is it to your uncle's house?

There are two bc a studen that equals to 2

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.