Calcium has the greatest mass of the first twenty elements with a mass of approximately 40.08
Answer:D.
Explanation:i used photo math. It is really helpful when I'm doing math homework etc...
Answer: 
Explanation:
Given : Sample size : n= 30 , it means it is a large sample (n≥ 30), so we use z-test .
Significance level : 
Critical value: 
Sample mean : 
Standard deviation : 
The formula to find the confidence interval is given by :-

i.e. 
i.e. 

Hence, the 95% confidence interval for the mean mpg in the entire population of that car model = 
B. a circle graph
circle graphs are the best to show percentages because they’re very easy to look at and get info from