Answer:
x=3
Step-by-step explanation:
Isolate x.
Divide both sides by four
Take
of both sides. In other words, what power must you raise 5 to in order to get 125? (
)
x=3
PLEASE HELP!! ILL MARK BRAINLYEST!! Evaluate 6C2 . 120 15 720 30
2 answers:
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Answer:
The lower bound of the interval is 88.9mm and the upper bound is 93.1mm.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 91 - 2.1 = 88.9mm.
The upper end of the interval is the sample mean added to M. So it is 91 + 2.1 = 93.1 mm
The lower bound of the interval is 88.9mm and the upper bound is 93.1mm.