You would use the Pythagorean theorem and plug it in
        
                    
             
        
        
        
Step-by-step explanation: To find the volume of a sphere, start with the formula for the volume of a sphere which is shown below.

Here, we are given that our sphere has a radius of 4 units.
So plugging into the formula, we have  .
.
Start by simplifying the exponent.
(4 units)³ is equal to (4 units) (4 units) (4 units) or 64 units³.
So we have  .
.
Next, we multiply (4/3)(64) which can
be thought of as (4/3)(64/1)
So multiplying across the numerators and across the denominators,
we have  .
.
 
        
             
        
        
        
Minus the 21 from the other side of the equation making it 7x=-21 then u divide the 7 from the x to the -21 resulting in x=-3
        
                    
             
        
        
        
Answer:
Yes (432 = 9 x48). 
Step-by-step explanation:
The trick you need to know is the theorem that says that if the digits in a number add up to a multiple of 9, then the number itself is divisible by 9. 
So we go 4+3+2 = 9. 
So as this sum of 9 is divisible by 9, it means 432 is also divisible by 9. 
If you want to work out the actual answer of 432 divided by 9, you can estimate it by doing 450 ÷ 9 = 50. Then see that 432 is 18 less than 450. And 18 = 2x9. So the answer to the division is 50-2 = 48. 
 
        
             
        
        
        
Step-by-step explanation:
the answer is 2/7 2578 (25510 - just positive