What is the domain of f(x) = sqrt(x^2 - 4)

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 1/2 x (6 x 4)+3 + 2 show your work

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?