9- (-2)Do I add or use KFC?
1 answer:
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Answer and Step-by-step explanation:
Variance is the measurement of the spread bewteen the numbers of the data set and can be calculated by the formula:
σ² = ∑(x - ⁻x)² / n
1) With the data, find its mean (⁻x) by adding all the values and dividing the sum by total number of elements the data has;
2) Subtract each value of the data to the mean;
3) Square the result of the subtractions;
4) Add the squares;
5) Divide the sum by the total number of elements of the set;
6) The result is the Variance (σ²);
Standard Deviation is the measure of how far the values of the data set are from the mean and it is the square root of Variance:
σ =
So, to calculate standard deviation, you just take the square root of the variance.
Answer:
3.57 miles
Step-by-step explanation:
Please consider the attachment.
We have been given that a campsite is 12.88 miles from a point directly below Mt. Adams. The angle of elevation is 15.5° from the camp to the top of the mountain. We are asked to find the height of the mountain.
We can see from the attachment that h is opposite side to angle 15.5 degrees and 12.88 miles in adjacent side.
We know that tangent relates opposite side of right triangle with its adjacent side.
Therefore, the mountain is approximately 3.57 miles high.
