X in (-oo:+oo)
x+5/12 = 5/8 // - 5/8
x+5/12-(5/8) = 0
x+5/12-5/8 = 0
x-5/24 = 0 // + 5/24
x = 5/24
x = 5/24
        
                    
             
        
        
        
E^7 = y --->(Add ln on both sides) lne^7 = ln y ---> (Bring down the power) (7)×lne = ln y ---> ( lne = 1 ) 7 = ln y
        
             
        
        
        
Answer:
1. 4+2d
2. 3k+20
Step-by-step explanation:
 
        
             
        
        
        
Answer:
B. 434
Step-by-step explanation:
sorry for the late response! it’s 434. I worked out the problem & took the test, B is the correct answer.
 
        
             
        
        
        
Answer:
The minimum sample size needed is  . If n is a decimal number, it is rounded up to the next integer.
. If n is a decimal number, it is rounded up to the next integer.  is the standard deviation of the population.
 is the standard deviation of the population.
Step-by-step explanation:
We have that to find our  level, that is the subtraction of 1 by the confidence interval divided by 2. So:
 level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Z-table as such z has a p-value of  .
.
That is z with a pvalue of  , so Z = 1.645.
, so Z = 1.645.
Now, find the margin of error M as such

In which  is the standard deviation of the population and n is the size of the sample.
 is the standard deviation of the population and n is the size of the sample.
How large a sample must she select if she desires to be 90% confident that her estimate is within 4 ounces of the true mean?
A sample of n is needed, and n is found when M = 4. So






The minimum sample size needed is  . If n is a decimal number, it is rounded up to the next integer.
. If n is a decimal number, it is rounded up to the next integer.  is the standard deviation of the population.
 is the standard deviation of the population.