Answer: determine the values to complete the relative frequency by row table... a=69.1 B=30.9 C=68.6 D=31.4
Explanation: I just did it and got it right hope it helps 
 
        
                    
             
        
        
        
First find out how much money she spent by doing 80 (original amount) - 33.56 (amount after spending): $46.44
Now she spent 46.44 dollars and each pound is 7.74:
46.44 / 7.74 = 6
She bought 6 lbs
        
             
        
        
        
Answer with Step-by-step explanation:
Since the demand is normally distributed the required probability can be found from the area under the normal distribution curve as 
Part a)
Given mean = 4500 yards per month
Standard deviation = 900 yards
Thus area under the curve corresponding to 6000 yards is found from the standard variate factor Z as

Area for Z = 1.67 = 95.22%
Thus the probability that the demand will be met is 0.9522 hence the probability that the demand will not be met is 
Part b)
The reuired answer is area between 5000 and 7000 yards in the normal distribution curve thus we have
 .
.

The area between these 2 values is 49.73% hence the reuired probability is 0.4973.
Part c)
For 97% satisfaction of demand the Z factor corresponding to 97% of area is found to be 1.88
thus we can write

 
        
             
        
        
        
Answer:
oh god let me try help
Step-by-step explanation:
hm, I seemed to have gotten 7.42 my deepest apologies if it's incorrect!! :(
 
        
             
        
        
        
Answer:
8 hours total
Step-by-step explanation:
100=2
400=8
2 times 4 =8