Answer: 756
Step-by-step explanation:
Given : The proportion of adults over 50 never graduated from high school. = 0.23
Margin of error : E=0.03
Significance level : 
Critical value : 
The formula to find the sample size is given by:_

i.e. 
Hence, the required minimum sample size = 756
Answer:
b
Step-by-step explanation:
b
You would just subtract/add like you normally would from left to right because its a subtract and add operation.
Hope that helps :)
You can't, the K cancels itself out. There is no solution to this
7,258,630-
seven million, two hundred fifty-eight thousand, six hundred thirty :-)