Answer:
#2 option: 
Step-by-step explanation:


= 
The answer is 20.
5*10-5*6=50-30=20
The domain of a function are the possible input values of the function.
<em>The domain of the function is (d) Whole numbers</em>
First, we identify the start and end values of x on the graph.
We have:

The graph has no end; so:

This means that the domain of the graph is 
The number of times one can visit the pool cannot be decimal.
Hence, the domain of the function is whole numbers
Read more about domain at:
brainly.com/question/15339465
4(c-d) is the answer bc the difference of (c-d) is done first, then multiplied by 4
Sometimes, because if the number is negative, the opposite is greater, but if the number is positive, the opposite is smaller.