Find the circumference and area of the circle

True or false look at the picture pls : /

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b?