ben has let out 22 meters of kite string when he observes that the kite is directly above. if ben is standing 9 meters away from ted. how high is the kite

The third box is a function

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.