I can't figure this out

Which ratio is equivalent to 10: 85

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? will mark the

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)