What is 3 5/8 + 2 7/12 ?

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

How is the number of vertices for a prism related to the name of the prism

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?