Two telephone poles are 75 feet apart and the poles are each 50 feet tall. what is the distance from the base of one pole to the top of the other pole?

90.1388 feet from the bottom of one pole to the top of another.

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.