Natalia compró cierta cantidad de chocolates que cuestan $8.00 cada uno. Al pagar con un billete de $50.00 recibió $18.00 de cambio, ¿cuál es la ecuación que permite obtener la cantidad de chocolates que compró Natalia?

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.