<span>Integral of 1/(x^2sqrt(4x+1)) = 4tanh^-1(sqrt(4x + 1)) - sqrt(4x + 1) / x + c</span>
        
             
        
        
        
after 1 year he will get : 800 + 800 x 3,5% = 800 x 1,035 = $828
after 2 years he will get : 828 x 1,035 = 800 x 1,035 x 1,035 = 800 x 1,035²
so
after n years he will get : 800 x 1,035ⁿ
 
        
                    
             
        
        
        
Set XY = XZ and solve for x
3x+5 = 5x-1
6=2x
x = 3
Then XY = 14 and XZ = 14 and YZ = 13.5
 XY congruent XZ
        
                    
             
        
        
        
rounding to nearest 10 to any number follow these rules
1. if number ends 0 , 1 , 2 ,3 4 , 5 take number down to nearset multiple of 10
2. if number ends with above 5 take the upper number multiple of 10
so here 
413 + 35.6 + 998.5 + 376 + 85.3
= 410 + 40 + 1000+ 380 + 90
= 1920 
 
        
             
        
        
        
Answer:
<h3>607.83333333333</h3>
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