Answer:
21 is the correct answer
Explanation:
9+12=21
21-12=9
(b) 31.85
First, we need to know the z-score for a one-sided confidence interval with 95% coverage. Looking at a z-score table, this value is 1.645. Then:
29.5
t=12
3t-8+1.5
3×12-8+1.5
=29.5
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yes
Answer: is the SAT hard?
Answer: C
I just did the test yw