In a class of students, the following data table summarizes how many students have a cat or a dog. What is the probability that a student who does
not have a cat has a dog?
Has a cat Does not have a cat
Has a dog
3
2
Does not have a dog
5
13

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.