Find the number of sides of a convex polygon if the measures of its interior angles have a sum of 3600º degrees

Select the appropriate response:

A) 22
B) 21
C) 20
D) 19

An internet company charges $8.95 per month for the first 3 months that it hosts your web site. then the company charges $11.95 per month for web hosting. how much money, in dollars, will the company charge for 8 months of web hosting?