Lunch is being served to members of a club. Each member orders a sandwich by choosing one type of bread, one kind of meat, and one kind of cheese. BREAD: white or whole wheat
MEAT: ham or turkey
CHEESE: cheddar, swiss, or american

Which tree diagram shows the correct sample space for the event?

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.