Answer:
b
Step-by-step explanation:
plus thanks for da pointz
 
        
                    
             
        
        
        
Answer:
0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 50
Standard Deviation, σ = 1.3
Sample size, n = 12
We are given that the distribution of hardness of pins is a bell shaped distribution that is a normal distribution.
Formula:
 
Standard error due to sampling =

P(sample mean hardness for a random sample of 12 pins is at least 51)
 
 
Calculation the value from standard normal z table, we have,  
 
0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.
 
        
             
        
        
        
Answer:
+$90;
$1,600
Step-by-step explanation:
The equation,  , given to us tells us much about the situation described above.
, given to us tells us much about the situation described above.
y = total pay
x = number of copies of Math is fun
1600 = y-intercept, that is the starting value or the pay he gets only if Sam sold 0 copy of Math is fun. That is, when x = 0, y = 1,600.
90 = unit rate or the change in the total pay for each copy of Math is fun that Sam sells.
Therefore, our answers would be:
+$90, and $1,600
 
        
             
        
        
        
<span>The answer should be 4.5 because they used AT LEAST 32 miles per gallon. So, 144/32=4.5 and since it's AT LEAST 32, 4.5 is the max amount used.</span>