Jill has 3/4 of a yard of ribbon. Tammy has 4/7 of a yard. how much do they have together?
2 answers:
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Answer:
The 99% confidence interval for the true mean number of reproductions per hour for the bacteria is between 9.6 and 10.
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 the margin of error 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 9.8 - 0.2 = 9.6 reproductions per hour.
The upper end of the interval is the sample mean added to M. So it is 9.8 + 0.2 = 10 reproductions per hour.
The 99% confidence interval for the true mean number of reproductions per hour for the bacteria is between 9.6 and 10.
Answer:
A, B, C are correct
Step-by-step explanation:
m∠T is the complement of ∠C, so is 90° -16.7° = 73.3° . . . matches C
The lengths of the sides are ...
t = a·cos(16.7°) = 49·0.957822 ≈ 46.93 . . . matches B (not D)
c = a·sin(16.7°) = 49·0.287361 ≈ 14.08 . . . matches A
