Answer:

Step-by-step explanation:
The formula of a volume of a sphere:

R - radius
We have R = 3 ?. Substitute

If the radius is 30, then the volume is:

If 30 is the length of diameter, then the radius R = 30 : 2 = 15.
Therefore the volume:

 
        
             
        
        
        
Answer:
$5.72
Step-by-step explanation:
The easiest way to do this is take the two deposits and add them together then combine with the original balance. 
Add 5.72 and 16.75
5.72+16.75=22.47
Then subtract -16.75 from 22.47
22.47-16.75=5.72
 
        
                    
             
        
        
        
B. Complementary means totaling 90 degrees, and supplementary means totaling 180 degrees.