If the surface area of a cylinder is given by SA = 2nr^2+2nrh, calculate the height if the surface area is 30n and the radius is 2.

The class wants to raise a total of $750.if they receive a profit of $1.25 from each candybar sold, how many bars must they sell to reachtheir goal

Which expression is equal to (f+g)(x)?

What is the distance between the points (2, 5) and (5,9)?