If you paid $12000 for stock that was $ 8 per share and then sold all shares for 15000 how much profit did you make ?

Ithink the right answer could be 50%

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.