Answer:
A
Step-by-step explanation:
Methods of describing a set involve using a roster or set-builder notation to outline it.
<h3>What are the methods of describing a set</h3>
The two methods of describing a set are:
- roster method
- set- builder notation method
Roster method describes a set by listing all its elements, separated them by commas and enclosed within brackets.
Set- builder notation method describes a set by describing its elements using mathematical statements
Therefore, methods of describing a set involve using a roster or set-builder notation to outline it.
Learn more about sets here:
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I believe the correct answer is D but I am not quite sure
Answer:
The first one -6 x 6
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given:
The given equation is 
We need to solve the given equation for r.
Rewrite the equation as.

Divide both side of the equation by 4π and simplify


Take the square root both side of the equation.


Therefore, the solution for r is both positive or negative 