Sally began a job that allows her to earn up to a maximum of 24 days of vacation time. She earns 4 days of vacation each year she is employed. How many years will it take Sally to reach the maximum amount of vacation time?

Add the fractions and simplify 1/2+ 1/3

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

Math i have no idea how to do a and b