#1 There is no area of a cube. There is only a volume.
#2 The formula is 

 where s is the side.
Substitute 729 in V since that is the volume.

Take the cube root and you will get 
9.
So the formula is  and the side is 9.
 and the side is 9. 
 
        
        
        
If you are trying to find the percentage he received: 58/100 
Total correct divided by total questions.
You get .58 or
58% by moving the decimal to spaces to the right.
        
             
        
        
        
Answer:
Below.
Step-by-step explanation:
(a) Over the first 5 seconds rate of change of speed
= (9-1)/5
= 8/5
= 1.6m/s^2
(b) (21-9)/16-t) = 2
12/16-t = 2
32 - 2t = 12
32 - 12 = 2t
20 = 2t
t = 10 seconds
 
        
                    
             
        
        
        
Answer:
- f(1) = 4
- f(n) = f(n - 1) + 4
Step-by-step explanation:
Given the sequence: 
The first term is 4 and common difference is 4
<u>Recursive formula:</u>
- f(1) = 4
- f(n) = f(n - 1) + 4