Seven students worked together on a project. How many ways can their teacher choose four to present the project?

the answer is 12 ways that she can choose four to present.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

15.36 per mile

but forgot to round

i am pretty sure