Answer:
I think the last you already have is right. I wasn’t very good at this but I try
Step-by-step explanation:
Answer: No
Step-by-step explanation:
A variable is always denoted with a symbol (commonly x), and a variable means that it can change based on what you plug into the symbol
Constants must always stay the same, so variables can't be constants and constants can't be variables
Answer:
Option B. 
Step-by-step explanation:
we know that
The volume of a cone is equal to

we have


substitute


assume

