Andre sometimes mows on the weekend to make extra money. two weeks ago, he mowed a neighbor’s lawn for 1/2 hour and earned $10. last week, he mowed his uncles lawn for 3/2 hours and earned $30. this week, he mowed the lawn of a community center for 2 hours and earned $30.

which job paid better than others?

It’s hard to understand what you put.. can you show a picture ?

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.