Answer:
864ft^3
Step-by-step explanation:
Divide the diameter by 2 to get the radius
12 / 2 = 6
Then solve the volume equation using 3 for pi.
4/3 * 3 * 6^3
4 * 6^3
4 * 216 = 864
 
        
                    
             
        
        
        
A fraction that is equivalent to 

 will have the form 

, where 
A and 
B are equivalent and factors that are multiplied in.
The product fraction should be easily simplified using 
A and 
B to get the original fraction.
<em>In the case of your fraction </em>

 you will need to find a fraction which is a product of this: 
 
 
        
        
        
X=56°
Because cos =90- sin
        
                    
             
        
        
        
Answer: (-∞,2)
Step-by-step explanation: 2 is not included in the interval since at x=2, the function crosses the x axis, meaning it is not positive, and instead 0. 
All x values below 2 are positive.