Answer:
where's the question...?
Step-by-step explanation:
 
        
             
        
        
        
Answer:
31 pieces
Step-by-step explanation:
6 + 5 x 5 = 31
 
        
             
        
        
        
Given:
μ = 89 ng/ml, population mean
σ = 23 ng/ml, population standard deviation
Random variable, x = 100
To test P(x < 100), calculate the z-score.
 z = (x-μ)/σ = (100 - 89)/23 = 0.4783
From standard tables, obtain
P(x < 100) = 0.6838 = 68.4%
Answer: 68.4%
        
             
        
        
        
Answer:
I think the answer is D
Step-by-step explanation:
 
        
             
        
        
        
Answer:
He drove 120 km
Step-by-step explanation:
We know that 1 hour of driving is equal to 80 km. We need to find out for 1.5 km. First, we need to know how much km for 1/2 of an hour. Which will be 40, because 80/2=40. Then we add up the 40 to the 80, and we get 120 km in total.