Ab is parallel to cd and ef is perpendicular to ab. the number of 90 degree angles formed by the intersections of ef and the two parallel lines ab and cd is

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?