Answer:
C. 16
Step-by-step explanation:
 
        
                    
             
        
        
        
The three points give you three equations, which you can solve by your favorite method.
.. 0m +0n +b = 6
.. 1m +0n +b = -3
.. 0m +2n +b = 5
(m, n, b) = (-9, -1/2, 6)
so the equation of the plane can be written as
.. z = -9x -1/2y +6
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In standard form, this would be
.. 18x +y +2z = 12
 
        
        
        
3 tens is 3 * 10 = 30
9 ones is 9 * 1 = 9
30 + 9 = 39
Answer: 39
        
             
        
        
        
300,000+90,000+5,000+40=395,040
395,040+10000=405,040