water bill in X secondary school average is 120 with standard deviation of 85, what percent have a water bill between 65 and 504. all expenses being in kwacha. ( hint: use k = 2, 3 & 4)​

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?