Answer:
Least to greatest is: 0.0625, 6.75% and
.
Step-by-step explanation:
Given:
The three quantities to compare are:
6.75%, 0.0625, and 
Let us convert each into percentage.
6.75% is already in percentage.
We multiply a number by 100 to convert it to percentage form.
So, 

Now, on comparing all the three percentage, we conclude that,
70% is the greatest and 6.25% is the least.
So, order from least to greatest is:

C(x) = 5x + 2
This is because at 1 hour it only cost 7 dollars, so it should only have 2 added to the end.