In which sets of numbers does 51 belong? A integer and rational
B. integer and whole
C. irrational and natural
D. whole and natural

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

What is a graph with a never ending line called?

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?