A two-day book fair had 182,987 visitors on the first day and 211,233 visitors on the second day. Approximately, what was the total number of visitors?

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.

7x the number of visitorsex. 3 visitors would be 7 x 3 =21$ total