Answer:

Step-by-step explanation:
we know that
The volume of a trough is equal to

where
B is the area of equilateral triangle
L is the length of a trough
step 1 
Find the area of  equilateral triangle B
The area of a equilateral triangle applying the law of sines is equal to

where


substitute


step 2
Find the volume of a trough

we have


substitute


 
        
             
        
        
        
Is this for a online final if it is I can’t help
        
             
        
        
        
Answer:
The answer is 1/27
Step-by-step explanation:
3^-3 can be written as 1/3^3 and 3^3 = 3x3x3= 27
Therefore, the answer is 1/27.
 
        
                    
             
        
        
        
 <em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>
 
        
                    
             
        
        
        
Answer:
16
Step-by-step explanation:
let the number be x , then
 x = 15 ( multiply both sides by 4 to clear the fraction )
 x = 15 ( multiply both sides by 4 to clear the fraction )
3x = 60 ( divide both sides by 3 )
x = 20 , then
 × 20 = 4 × 4 = 16
 × 20 = 4 × 4 = 16