The price of Stock A at 9 A. M. was $14.89. Since then, the price has been increasing at the rate of $0.06 each hour. At noon the price of Stock B was $15.64. It begins to decrease at the rate of $0.16 each hour. If the two rates continue, in how many hours will the prices of the two stocks be the same? In about __?__ hours, the prices of the two stocks will be the same.

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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.