A circular aluminum sign has a radius of 28 centimeters. If a sheet of aluminum costs $0.33 per square centimeter, how much will it cost to make the sign? Use 3.14 to approximate π.

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10