Answer:
uhhhhh what. 
Step-by-step explanation:
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12.96 .12 times 8= .96 then add it to 12
        
             
        
        
        
2450 is the correct answer because if you multiply 3500 x .70 then you get 2450. Hope this helped 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
z(lower) = (15-15)/4 = 0
z(upper) = (19-15)/4= 1
z  at  0 = .5
z at  1 = 0.841344746
(look these up in a Z table) 
probability "between" = 0.841344746 - .5 = 0.3841344746
 
        
             
        
        
        
X is greater than or equal to -5