Answer:
The cost of each cotton candy bag is $4.
Step-by-step explanation:
Consider the provided information.
Let, the vendor has  dollar at the starting of each day.
 dollar at the starting of each day.
Let, the cost of each cotton candy bag is  .
.
Now when she sells a total of 12 bags, she has $128. 
 .....(1)
  .....(1)
After she sells a total of 20 bags, she has $160.
 ....(2)
  ....(2)
Subtract equation 1 from equation 2.



Hence, the cost of each cotton candy bag is $4.
 
        
             
        
        
        
Answer: 0.6934%
Step-by-step explanation:
Probability is the branch of mathematics that is concerned with the numerical descriptions of how likely an event will occur or how likely a proposition is true
If 37% of high school students said that the exercise regularly, the
probability that 5 students who are randomly selected will say thay they exercise regularly will be:
= (37/100)^5=0.006934
= 0.6934%
 
        
             
        
        
        
Answer:
The correct option is 1.148 < σ < 6.015
Explanation:
The 99% confidence interval for the standard deviation is given below:

Where:


Therefore, the 99% confidence interval is:


Therefore, the option 1.148 < σ < 6.015 is correct
 
        
             
        
        
        
Answer:
Junk gets 72
Step-by-step explanation:
Leah: Junko: total
1            8         1+8 = 9
The total is 81
81/9 = 9
Multiply each part by 9
Leah: Junko: total
1*9         8*9    9*9
9             72    81
 
        
                    
             
        
        
        
Answer:
x5
Step-by-step explanation: