hellppp !
which expression represents a rational number

Step-by-step explanation:

So options 1,2,3,6 are rational numbers. It is a whole number which is the form of rational number. So addition of any number to an irrational number is always irrational number.

To find means number, you need to find the sum of all number and divided it for 14 in this case.
We know that:
Kim ran 3 one-mile races, which is 3 miles total
Kim ran 6 two-mile races, which is 6×2=12 miles total
Kim ran 4 five-mile races, which is 4×5=20 miles total
Kim ran 1 ten-mile race, which is 10 miles total, which means that Kim ran total:
3+12+20+10=45 miles, then the means will be:
45/14≈3.21. As a result, the means is about 3.21. Hope it help!