Answer:


Step-by-step explanation:
Given

Solving (a): The cost function:
From the given parameter, it shows that the number of floor has no effect on the floors.
So, represent the floors with x.
The cost function is:

Solving (b): The slope and its interpretation
A function is represented as:

Where:

By comparing:
to 

So:

<em>What it means is that, no matter the number of floors, the cost remains unchanged.</em>
Answer:
10.8
Step-by-step explanation:
to so the mean you add up all of the numbers and divide by the amount you have. so add up all the numbers to get 54, the divide 54 by 5 because there are numbers.
The answer to your very hard question was very hard to do but the answer is 2
Answer:

Step-by-step explanation:
We know that 

= -4i+6+2
=8-4i