Andrew has $65.50. He is paid $11.50 for each earbud case he sells. He has a goal of earning $146. Write an equation to determine the number of earbud cases he must sell to meet his goal, then solve.​

The radius of the base of a cylinder is 10 centimeters, and its height is 20 centimeters. a cone is used to fill the cylinder with water. the radius of the cone's base is 5 centimeters, and its height is 10 centimeters.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry