Joe’s bathroom floor is 5 feet wide and 8 feet long. he will cover the floor with 3-inch square tiles. how many tiles does joe need? a 120 b 160 c 360 d 640

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.

The answer you are looking for is right in front of you it’s c. 3/20