Last year a poll of 1,000 voters conducted by the staff of Senator Chun found that 333 people approved of the job the senator was doing. This year, a new poll of 1.000 voters shows that 550 people approve of the senator's performance. Find the percent of change in the number of voters who approve of the senator's performance, and
identify it as an increase or decrease

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.