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wwall7
16.01.2020 •
Mathematics
Let n cards carry the distinct numbers x_1 . if two cards are drawn at random without replacement, show that the correlation coefficient rho between the numbers appearing on the two cards is -1 / (n - 1).
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Ответ:
1. First, you must apply the formula for calculate the area of a semicircle, which is:
A=πr²/2
A is the area of the semicircle.
π=3.14
r is the radius of the semicircle
2. The radius is:
r=D/2
r=30.77 feet/2
r=15.385 feet
3. When you substitute the values into the formula, you obtain:
A=πr²/2
A=(3.14)(15.385 feet)²/2
A=371.61 feet²
The area that will be painted grey is: 371.61 feet²