1. If the increase in time causes a corresponding decrease in the price of a product. Identify the proportionality. 2. Identify the variation: “For the increase in speed, the time to cover a fixed distance reduces”.

Hey dear, hoping i'll be

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.