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kykrilka [37]
4 years ago
11

Help Please 25 points for real answers

Mathematics
1 answer:
trasher [3.6K]4 years ago
7 0
1. B
 
2. D

3. C= πD
 a) 204π or  641 cm 
A= π r²
 b) π (102)²
10404π squared cm or 32669 squared cm

4. C

5. D
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3 years ago
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Vinvika [58]

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3 years ago
Does anyone know the answer to this ?
melamori03 [73]

Answer:

1595 ft^2

Step-by-step explanation:

The answer is obtained by adding the areas of sectors of several circles.

1. Think of the rope being vertical going up from the corner where it is tied. It goes up along the 10-ft side. Now think of the length of the rope being a radius of a circle, rotate it counterclockwise until it is horizontal and is on top of the bottom 20-ft side. That area is 3/4 of a circle of radius 24.5 ft.

2. With the rope in this position, along the bottom 20-ft side, 4.5 ft of the rope stick out the right side of the barn. That amount if rope allows for a 1/4 circle of 4.5-ft radius on the right side of the barn.

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total area = area 1 + area 2 + area 3

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total area = 3/4 * (pi)(24.5 ft)^2 + 1/4 * (pi)(4.5 ft)^2 + 1/4 * (pi)(14.5 ft)^2

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6 0
3 years ago
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3 years ago
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Svet_ta [14]

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