Translate into an algebraic expression, find the number if 10% of it is m

This is about circle theorems. someone asap : (

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.

What is the measure of angle a and angle c ?