SOLUTION: A resturant patron has decided to leave a 15% tip for meals costing up to $40, an 18% tip for meals costing at least $40 but less than $100, and a 20% tip for meals costing $100 or

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A resturant patron has decided to leave a 15% tip for meals costing up to $40, an 18% tip for meals costing at least $40 but less than $100, and a 20% tip for meals costing $100 or      Log On


   

Question 901331: A resturant patron has decided to leave a 15% tip for meals costing up to $40, an 18% tip for meals costing at least $40 but less than $100, and a 20% tip for meals costing $100 or more. Write a piecewise function to describe the total amount t the patron will pay in terms of the meal cost c.
The answer sheet has the answer as t(c)= {1.15c and so on

{ 1.18c and so on
I don't understand why they have a 1 before the decimal. Isn't 15% only 0.15 and not 1.15?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!

c is the bill
.15c is just the tip without paying the bill
1.15c is adding the tip to the bill