Wilson paints 40% of a bookcase in 20 minutes. How much more time will it take him to finish the bookcase? So, how would you write this as an equation using equal fractions to represent the situation?

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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.