A 25 foot ladder is leaning against a house. If the angle of Elevation of the ladder is 72 degrees: How high up the house does the ladder touch?
How far away is the ladder from the house?
Round to the nearest tenth.

The answer is 41.7 because 1.39 times 30 is 41.7

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.