Answer:
A. Amount(hours worked)  
Step-by-step explanation:
Function notation is a way of converting a written description of a function to a concise form that is easy to read.
It is another way of representing the y-value in a function, y = ƒ(something)
Let's convert the word expression to function notation:
- "The amount charged for labour depends on the time the repair technician works."
- "The amount depends on the hours worked."
- "The amount is a function of the hours worked."
- Amount = amount(hours worked)
 
        
             
        
        
        
Answer:
See below.
Step-by-step explanation:
Let's look at the cost for members (C1) first.  Let x be the number of visits.
C1(x) = 12 + 8x
For non-members (C2), we can do the same.
C2(x) = 10x
You can graph these two equations.
x        C1         C2
0       12          0
1        20        10
2       28        20
3       36        30
4       44        40
5       52        50
6       60        60
7       68        70
Let's make the two equations equal, to find out where the benefit is the same.
12 + 8x = 10x
2x = 12
x = 6
Up to 5 visits, the non-member cost is better.  At 6 visits, there's the same price.  For more than 6 visits, the member cost is better.
 
        
             
        
        
        
The answer is high variability
        
             
        
        
        
Yes, 0.069 is less than 0.07~
First, we compare the "one" place: 0 = 0.
Second, we compare the "tenth" place: 0 = 0.
Next, we compare the "hundredth" place: 6 < 7.
Because 6 < 7, 0.069 < 0.07 as a result~