The diagram shows the ratio of teeth on the larger and smaller gears of Nash's fishing reel.
A tape diagram showing 6 parts labeled "larger gear" and 1 part labeled "smaller gear"
Based on the ratio, how many teeth are on the smaller gear if there are 72 teeth on the larger gear?

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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.