We are given with an 18 student class that is working a project worked by pairs. Each pair works on a project. In this case, there are 9 teams of 2 individuals working on a single project. Hence for a year or school year, there are 9 projects accomplished each time.
Answer:
4
Step-by-step explanation:
Why would we need 3.14 as pi? The answer is 45/10 = 4.5 inches.