40 е
2. Drew practices piano at least 45 minutes
per day. He has already practiced 18.5
minutes today. Determine how much longer
he will have to practice. Then interpret the
solution. (Example 1)

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.