The deviation from the mean of a set of numbers are (k+3)^2, (k+3)^2, -2, k and (k+2)^2 where k is a constant . Find the value of k

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?

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!

Write the expression 7x^3-28xy^2 as the product of 3 factors