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hammer [34]
3 years ago
12

I really need help solving these two problems  

Mathematics
1 answer:
Oxana [17]3 years ago
7 0
.........................

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Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations).
masya89 [10]

Answer:

40\pi \ m^{2}

Step-by-step explanation:

we know that

The area of a circle is equal to

A=\pi r^{2}

In this problem we have

r=10\ m

Substitute and find the area

A=\pi (10)^{2}=100 \pi\ m^{2}

Remember that

360\° subtends the area of complete circle

so

by proportion

Find the area of the shaded regions

The central angle of the shaded regions is equal to 2*72\°=144\°

\frac{100\pi }{360} \frac{m^{2}}{degrees} =\frac{x }{144} \frac{m^{2}}{degrees} \\ \\x=144*100\pi /360\\ \\ x=40\pi \ m^{2}

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2 years ago
Find the distance between the points (4, 3) and (0, 3).
Serga [27]
The answer is 5 points
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Solve |x + 7| &lt; 6<br> its for homework
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Ok so if you follow the process of pemdas is should be easy pemdas equals: parentheses, exponents, multiple and divide from left to right, lastly add and subtract from left to right
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A bag contains 3 red marbles and 6 blue marbles. what is the probability of randomly selecting a red marble
DochEvi [55]
3/9 is your answer. 3+6=9 and there are 3 red marbles.
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What if Scott bought 3 more stamps and now has 21 stamps? Some album pages have 1 stamp and some pages have 2 stamps. Show how m
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So there are 8 different ways.

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