drma1084
03.09.2021 •
Mathematics
(2pts) 2. Answer the following questions given this data:
5
13
18 6 18
mean: 12
1. Find the mean absolute deviation for the data. (1 pt)
2. Find the interquartile range for the data. (1pt)
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Ответ:
The length of BC ≈ 12.4 cm
Step-by-step explanation:
The first thing we need to do is to find the length of BD which we can solve for with the tangent of 20° which is the opposite side over the adjacent side.
We get tan20° = BD/8.
Solve for BD and you get BD = 8tan20°.
Now we will need to solve for the length of CD which we can get from the tangent of 40°.
We get tan40° = 8/CD
Solve for CD and you get CD = 8/tan40°.
Now that we have the lengths of BD and DC, we can simply add them together to get the length of BC.
(8tan20°) + (8/tan40°) ≈ 12.4 cm