A surveyor is measuring a triangular lot. From point A he measures 400 m at a bearing of N20°E to reach point B. He then adjusts his equipment to read S60°E for 600 m until
he reaches point C. How far is point C from point A? Finish labelling the diagram, then
show all steps in your solution. [4A, 2C

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.