A 40-foot ladder is leaning against a wall. To use the ladder safely, the angle between the wall and the ladder must be no more than 15 degrees. A worker places the bottom of the ladder 12 feet from the wall, and begins to climb. is the worker safe?

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.

Iwould say always for the both of them