Lucy was given $28.87 to buy 3 story books and 4 comic books. however she bought 4 storybooks and 3 comic books and had $2.69 left. how much did each comic book cost?

Sis less than or equal to 75 (bottom left)

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.