Answer:
  x =  68/33
Explanation: 
Step 1: Simplify both sides of the equation.
Step 2: Subtract 2/5x from both sides.
Step 3: Add 80 to both sides.
Step 4: Multiply both sides by 5/198.
 
        
             
        
        
        
Answer:
The amount of popcorn needed to  fill the paper cone is 
Step-by-step explanation:
we know that
The volume of a cone is equal to

In this problem we have



substitute

