If you are going to illustrate the terms: differences, unions, and intersections involving sets, how will you do it?

Ihonestly don’t understand this at all

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Frank has $66.50 in his account on sunday. over the next week, he makes the following changes to his balance via deposits and purchases: day debit ($) credit ($) monday 60.33 80.75 tuesday 54.45 wednesday 49.20 15.00 thursday 35.40 friday 16.85 75.00 saturday 80.56 on what day does frank first get charged an overdraft fee? a. wednesday b. thursday c. friday d. saturday select the best answer from the choices provided a b c d