1. The cost (in dollars) per unit of making x photocopies at The Office Shop is given 18 cents for at most 20 copies
► 12 cents for more than 20 copies up to 50
9 cents for more than 50 copies but less than 100
5 cents for 100 copies or more but up to 200
> 3 cents for more than 200 copies
Part A: Write the piecewise-defined function that represents the situation.
Part B: Represent the function on the graph below.
Part C: Explained why it would not be cost-effective to make 150 photocopies.

i dont know sorry

step-by-step explanation:

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.