Answer:
x=-5
Step-by-step explanation:
subtract 45 from left side. 35-45=-10. divide 2 by -10.
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Answer:
3
Step-by-step explanation:

a = 3 & b =4
Answer: 1.88
Step-by-step explanation:
The confidence interval for population mean is given by :-

Given : Significance level : 
Critical value : 
By using the standard normal distribution table for z, we find the critical value of
corresponds to the p-value 0.03.

Hence, the z-value that was used in the computation must be 1.88 .