Ms. Mason is buying t-shirts for her pottery club members. The t-shirt company chargers her according to the piecewise function below, where C(t) is the total cost of the shirts and t is the number of t-shirts that she ordered. If she has 54 members how will her total be?

If she has 2 members how will her total be

If she only has 7 members how much will each t-shirt cost?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?