u=9 is your answer.
Hope this helps!
-6=2x please answer quickly
2 answers:
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Answer: (53.49%, 62.51%)
Step-by-step explanation:
Given : A poll found that 58% of U.S. adult Twitter users get at least some news on Twitter.
i.e. p= 0.58
The standard error for this estimate was 2.3%
i.e. S.E.=0.023
Critical value for 95% confidence :
Confidence interval :
i.e.
Conclusion : We are 95% confident that the true population proportion of U.S. adult Twitter users who get some news on Twitter falls in interval (53.49%, 62.51%)
Given:
The number of tickets = 1000
Mathew buys a single ticket for $8
Winning price = $800
To find:
The expected earning per ticket.
Solution:
It is given that the total number of tickets is 1000. So, the probability of winning is:
The probability of losing is:
The expected earning per ticket is:
Therefore, the expected earning per ticket is -7.192. Here, negative sign means loss of $7.192.