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.

Asap the total attendance for all of a baseball league in 2012 was about 7.5×107 fans, while the attendance for the tornadoes in 2012 was about 1.5×106 fans. about how many times more was the attendance for the entire baseball league than the attendance for just the tornadoes? 50 times more 10 times more 2 times more 5 times more

The sum of two numbers is 86, and their difference is 20. find the two numbers

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60