Answer:
The domain is 
Step-by-step explanation:
Given functions
and 
Subtract these two functions:

Plot these difference on the coordinate plane (see attached diagram). This function is defined for all vlues of x, so the domain is 
Independent is the x dependent is the y
independent- time
dependent- total number of knee bends
Answer:
I think it is G
Step-by-step explanation:
So ya see, it really does peak at the given times.
3.14 the perimeter is the 4 in 3.14