Hallemos el capital que produjo un interés de 17100 al cabo de seis meses a una tasa de interés de 9, 5% anual??es para las 5 de la tarde

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.