A parallelogram without four right angles would prove that to be false.
        
                    
             
        
        
        
You are trying so solve 
<span><span>3^x</span>=8</span> 
and since 8 is not an integral power of x you need a calculator. 
it is <span><span>ln(8)/</span><span>ln(3)</span></span>
or 
<span><span><span>log(8)/</span><span>log(3)</span></span></span>
        
             
        
        
        
Multiply 0.57 by 51
=29.07
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