Two lengths of a triangle are 5 in and 10 in. What can be the other length

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.

We’re gonna need a picture to refer to in order to figure it out. try reposting your question with the picture included.