A boat with a horizontal tow rope pulls a water skier. She skis off to the side, so the rope makes an angle of 15° with the forward direction of motion. If the tension in the rope is 180 N, how much work does the rope do on the skier during a forward displacement of 300 m? 1.40 × 104 J
5.40 × 104 J
5.22 × 104 J
−5.22 × 104 J

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.