The radius of earth is approximately 6400 km .the equator is the circle around earth dividing it into the northern and southern hemispheres. what is the length of the equator

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

How do you find principle and simple interest

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?