Some researchers wanted to monitor the trout population, so they marked 190 trout with tags. Later, they captured 460 trout and found that 19 of them had tags. To the nearest whole number, what is the best estimate for the trout population?

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.