If the cost of House L increased by 20% over the same time that the cost of House M decreased by 20%, then the ratio of the new price of House M to the new price of House L is what percent of the original cost of House M

Which statements regarding the diagram are true? check all that apply.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?