Find the new amount given the original amount and the percent of change.

$6; 40% increase

Ithink it is 7. 16

Hnmmmn not sure

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.