A ladder is leaning against a wall. The foot of the ladder is 7 feet from the wall. The ladder reaches a height of 16 feet on the wall. What is the approximate measure of the angle the ladder makes the wall? I need help asp

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.