You have a probability of 7% to pick out the first orange marble then you have a probability of 8% to pick out the second orange.
        
             
        
        
        
Since the values are the same on both sides the matrix value is a=1
        
             
        
        
        
Answer:
62
Step-by-step explanation:

 
        
             
        
        
        
S=6a²
a=8mm
S = 6 * 8² = 6 * 64 = 384 mm²
        
                    
             
        
        
        
<span>calcium hydride + water → calcium hydroxide + hydrogen</span>