All of the angles measure less than 90 degrees
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
We can plug this into a formula and get

the .9075 comes from 1 - the depreciation value of 9.25% which converts to .0925 in decimal form. 
? is what we are trying to solve for. 
We can divide both sides by 19,700 and we get

so ? is about 13.
 
        
             
        
        
        
Step-by-step explanation:
To find the formula for the nth term ,
First , find the common difference or common ratio.
Common difference = 

Common ratio = 

The common difference applies to the other given numbers for example :

this proves that it is an arithmetic sequence and the given formula for the nth term of an arithmetic sequence is
T_n =a(n-1)d
Where n = no of terms
a= first term
d= common difference