In the san gabriel mountains in california, lookout station running deer is 18 kilometers due west of station lazy bear. the bearing from running deer to a fire directly south of lazy bear is s38.4°e. to the nearest tenth of a kilometer, how far is the fire from running deer?

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.