Answer: A)
Step-by-step explanation:
D= {-1}
R= {4,9,15,0}
Function? No, the relation is not a function.
Answer:
The perimeter of room is 
Step-by-step explanation:
We are given the following in the question:
The length and width of a room are measured with uncertainties.
There is uncertainty of 0.1 m in each measurement.
Length = 
Width = 
Formula:
The perimeter of room is given by:

The uncertainties are also added and multiplied.
Thus,the perimeter of room is 