Answer:

Step-by-step explanation:
Given

Required
Determine number of items that gives maximum earnings;
The general form of a quadratic equation is:

And the maximum is calculated as:
If a<0
Comparing
to 
We have that:

Substitute these values to




<em>The number of item that maximizes the function is when y = 15</em>
Answer:
666
Step-by-step explanation:
666
Answer:
yes because she adds 4:1.
Step-by-step explanation:
Answer:
It has no value whatsoever, anyhoo, E does.