Math because im very bad at it

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

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i