D because of the vertical line test. The c input 2 has two different out puts meaning that it is not a function
A quadratic table is it self and the linear table is also it self
Answer:
65.1 decibels
Step-by-step explanation:
Given
--- intensity
Required
Determine the sound level
This is calculated using:

Where:

So, we have:

Apply law of indices


Using a calculator, we have:


Answer: The answer is 
Step-by-step explanation: Given that Rei is barricading a door to stop a horde of zombies by satcking boxes of books on a table in front of the door.
The weight of each box is 30 kilograms and the weight of the table with 8 boxes on the top is 310 kilograms.
So, if 'g' denotes the weight of the table alone, then we have

Therefore, the weight of the table without boxes is 70 kilograms.
Now, if 'W' is the total weight of the barricade, then it can be written as a function of 'x', the number of boxes Rei stacks on the table. The expression is as follows -

Thus, the required function is

Four points are always coplanar if the points lie on the same geometric plane. All points in that plane are said to be coplanar. Not only points can be coplanar, even objects that lie on the same plane are said to be coplanar.