Which one is correct? Please hurry :)

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

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?