Can I get help with these 2 questions

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

What numbers are included in the set of integers? what numbers are not included?

Worth 15 points handsome jack is buying a pony made of diamonds. the price of the pony is p dollars, and jack also has to pay a 25% diamond pony tax. which of the following expressions could represent how much jack pays in total for the pony? a= p = 1/4 b= p+0.25p c=(p + 1/4)p d=5/4p 0.25p choose 2 answers