Which expression does not name an interger? a. -15 b. 6/14 c. 0 d. 12/6

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

What is always true when two whole numbers are subtracted?