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IRINA_888 [86]
3 years ago
7

What is the approximate area of the decagon? Recall that a decagon is a polygon with 10 sides.

Mathematics
2 answers:
JulsSmile [24]3 years ago
8 0

A = 5 / 2 a^2 square root over 5 + 2 square root of 5

hopefully this helps you out

AURORKA [14]3 years ago
4 0

Answer: it’s 188 cm

Step-by-step explanation:

I took the quiz

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A rotating lawn sprinkler sprays water in a circular area of grass as shown in the picture. The diameter of the circular area of
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Answer:

9\pi \: \mathrm{ft^2\:or}\: 28.27 \mathrm{\: ft^2}

Step-by-step explanation:

The area of a circle is given by r^2\pi where r is the radius of the circle. The diameter is given as 6 feet, so the radius of this circle is \frac{6}{2}=3 feet.

Plugging in our values, we get:

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Prove that the gregorian calendar repeats itself every 400 years.
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The calendar obviously has an integral number of years and months in 400 years. If it has an integral number of weeks, then it will repeat itself after that time. The rules of the calendar eliminate a leap year in 3 out of the four century years, so there are 97 leap years in 400 years. The number of excess days of the week in 400 years can be found by ...

(303·365) mod 7 + (97·366) mod 7 = (2·1 + 6·2) mod 7 = 14 mod 7 = 0

Thus, there are also an integral number of weeks in 400 years.

The first day of the week is the same at the start of every 400-year interval, so the calendar repeats every 400 years.

3 0
3 years ago
How can i converted 4 7/10 to an improper fraction
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The whole number multiply by the denominator and add to the numerator.

4\dfrac{7}{10}=\dfrac{4\cdot10+7}{10}=\dfrac{40+7}{10}=\dfrac{47}{10}
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