A person invests 3000 dollars in a bank. The bank pays 5% interest compounded semi-annually. To the nearest tenth of a year, how long must the person leave the money in the bank until it reaches 5200 dollars?

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.

31/6= 19/6 19/6 *1/7=19/42