B is the answer.
x (the variable for number of hours worked) must be connected the number indicating the hourly rate, which is 56.
375 must be added at some point in the equation due to it being an indicated signing bonus (it has to be added).
5 I’m not the best at math but counting to the nearest tenth that should be answer or 0
Answer:
b. quadruple the sample size.
Step-by-step explanation:
Given that a 95% confidence is given by (15,20) .
this implies that mean = average of lower and higher bounds of confidence interval = ![\frac{15+20}{2} =17.5](https://tex.z-dn.net/?f=%5Cfrac%7B15%2B20%7D%7B2%7D%20%3D17.5)
Margin of error = Upper bound - Mean = ![20-17.5 = 2.5](https://tex.z-dn.net/?f=20-17.5%20%3D%202.5)
Confidence level = 95%
Critical value = 1.96
Std error = ![\frac{2.5}{1.96} =1.27551](https://tex.z-dn.net/?f=%5Cfrac%7B2.5%7D%7B1.96%7D%20%3D1.27551)
Std devition = Std error * sqrt n = 6.3775
If we want to reduce margin of error by half we must get margin of error as 1.25
For that std error for same critical value = 0.63775
Std deviation did not change
So sample size only changed which implies that sample size is 4 times the original
b. quadruple the sample size.
Answer:
S A S
Step-by-step explanation:
Corresponding sides are in same ratio
![\dfrac{21}{15}=\dfrac{14}{10}\\\\\dfrac{7}{5}=\dfrac{7}{5}](https://tex.z-dn.net/?f=%5Cdfrac%7B21%7D%7B15%7D%3D%5Cdfrac%7B14%7D%7B10%7D%5C%5C%5C%5C%5Cdfrac%7B7%7D%7B5%7D%3D%5Cdfrac%7B7%7D%7B5%7D)
And the in between angle of the corresponding sides are common.
So, S A S similarity
76 -20 = 56 so then you do 56/8 which is 7
So 7 is the answer Hope this helps