Here's a solution for #8
Volume of a sphere = V = 4/3π r³
Your radius r = 6, so plugging that in you get:
V = 4/3π(6³)
V = 4/3π216
V = 864/3π
V = 288π (units³)
The key word here is "or". If it's an OR question, you add the probabilities together. If it says "and", you multiply them together
As it is an OR question though, you add them.
So:
15 + 5 = 20%
Answer:
The system has infinitely solutions
Step-by-step explanation:
we have


Multiply by 3 both sides
----> equation A
The equation A is a circle centered at origin with radius 
and


Divide by 5 both sides
----> equation B
The equation B is a circle centered at origin with radius 
Equation A and Equation B are the same
Therefore
The system has infinitely solutions
The square root of -1 “i”
5 pencils cost $.80. Each pencil costs $0.16
Then divide $0.16 into $0.40
This equals 2.5 pencils, you can't buy half a pencil