What is an example of a direct variation? What is an example of an inverse variation? Where and how are these used in science and engineering?

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?