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Answer: 2.460
Step-by-step explanation:
The formula of Margin of Error for (n<30):-
Given : Sample size : n= 18
Level of confidence = 0.90
Significance level : 
Using the t-distribution table ,
Critical value : 
Standard deviation: 
Then, we have
Hence, the margin of error (ME) of the confidence interval with a 90% confidence level = 2.460
11 = -d+15
subtract 15 from each side
-4 = -d
divide both sides by -1
d = 4
Answer:
- 13
Step-by-step explanation:
To evaluate h(j(2)) substitute x = 2 into j(x) then substitute the value obtained into h(x)
j(2) = - 2 × 2 = - 4, then
h(- 4) = (3 × - 4) - 1 = - 12 - 1 = - 13
Hence h(j(2)) = - 13
I got 4x^2 - 5x + 15 by expanding it
