Jane wants to convert 2 gallons of 25% acid solution into a 15% acid solution. How many gallons of water is she
supposed to add to the original solution to achieve this conversion?

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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.