Name the following type of function by finding either a common difference, a common second difference, or a common ratio:

Sketch one cycle if the cosine function y=2cos2theta

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Mason and christian go to the movie theater and purchase refreshments for their friends. mason spends a total of $45.75 on 3 bags of popcorn and 6 drinks. christian spends a total of $71.50 on 6 bags of popcorn and 4 drinks. write a system of equations that can be used to find the price of one bag of popcorn and the price of one drink. using these equations, determine and state the price of a drink, to the nearest cent.