Answer:
Triangular Prism Calculator
Step-by-step explanation:
 
        
             
        
        
        
Answer:
9 7/8 - ( -2 4/5 - 1/2)  = 13.175
Step-by-step explanation:
Hope this is correct and helps.
 
        
             
        
        
        
We can display the information given as an equation:
2000 * 

 = 4000; r = increase per annum
Now, we rearrange and solve for r:

 = 2
r = 
![\sqrt[19]{2}](https://tex.z-dn.net/?f=%20%5Csqrt%5B19%5D%7B2%7D%20)
 = 1.037.....
We can now work out the increase for 5 years like so:
2000 * 

 = 2400.205..... ⇒ 
$2400