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Neporo4naja [7]
2 years ago
12

The radius of a semicircle is 2 centimeters. What is the semicircle's area?

Mathematics
2 answers:
LuckyWell [14K]2 years ago
7 0

Answer:

40.53cm2

Step-by-step explanation:

40.53cm2

defon2 years ago
4 0

the answer is 40.53cm2

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GUYS I NEED HELP ASAP!!!<br><br> Help me solve ?
Shalnov [3]

Solution:

$h=\frac{ A-2\pi r^2}{2\pi r }

Given data:

A=2\pi r^2+2\pi r h

Let us determine what is h using given A.

A=2\pi r^2+2\pi r h

Subtract 2\pi r^2 on both sides of the expression.

⇒ A-2\pi r^2=2\pi r^2+2\pi r h-2\pi r^2

⇒ A-2\pi r^2=2\pi r^2-2\pi r^2+2\pi r h

⇒ A-2\pi r^2=2\pi r h

Divide both sides of the expression by 2\pi r.

$\frac{ A-2\pi r^2}{2\pi r }=\frac{2\pi rh }{2\pi r }

$\frac{ A-2\pi r^2}{2\pi r }=h

$h=\frac{ A-2\pi r^2}{2\pi r }

Option C is the correct answer.

Hence $h=\frac{ A-2\pi r^2}{2\pi r }.

8 0
3 years ago
On the day that a certain celebrity proposes marriage, 252525 people know about it. Each day afterward, the number of people who
Serhud [2]

Answer:

A

Step-by-step explanation:

The graphs are attached.

First of all, the day proposal goes out, 25 people know, so the initial condition is y = 25 at x = 0.

Hence, graph would start at y = 25.

Looking at the graphs, we can eliminate B and D immediately because they start at 50.

Now, it says every day, this number (y) triples, so 1 day after, it would be:

25 * 3 = 75

So, the graph would show x = 1 and y = 75

We can eliminate "C" as it doesn't show 75 at x = 1.

And we look at A and it is correct.

So,

A is the graph of the situation represented.

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3 years ago
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astra-53 [7]
Well 1+7 =8
And 7+1 are the same digits so 1+7=7+1=8
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12-3 (2w+1)=7w-3 (7+w)
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3 years ago
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Kelsey graphed the equation y = 3x + 1 as shown below.
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I think it’s B but I’m not for sure
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