If you purchase a Costco membership for $60 a year you can buy gas for $1.86 a gallon. If you don't purchase the membership you would have to pay on average $2.40 a gallon. What are the equations from the situation above?

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex