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Gnoma [55]
3 years ago
10

When and , the value of the expression is

Mathematics
1 answer:
yan [13]3 years ago
4 0
I don’t understand the question do u think u can elaborate it more?
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Problem
ddd [48]

Answer:

The area of the circular cross section of the pipe is 100\pi\ cm^{2}

Step-by-step explanation:

we know that

The area of the circle (cross section of the pipe) is equal to

A=\pi r^{2}

we have

r=20/2=10\ cm ----> the radius is half the diameter

substitute

A=\pi (10)^{2}

A=100\pi\ cm^{2}

8 0
4 years ago
Find the area and the perimeter of a quadrant of a circle with radius 4m correct to 3 significant figures
iogann1982 [59]
Area of a quarter circle = 1/4 * pi * r^2

 = 1/4 * pi * 4^2    =   12.6 m  to 3 sig figs.

perimeter = 4 + 4 + 1/4 * 2 pi * 4 =  14.3 to 3 sig figs.

 

















8 0
3 years ago
Guys people how about this this ....
Lapatulllka [165]

Answer: Since FK is half the line, and FH is the whole line 6*2= 12

so FH=12

7 0
3 years ago
Read 2 more answers
Imara used these steps to find the length of the hypotenuse of the right triangle.
andriy [413]

Answer:

C

Step-by-step explanation:

I did the test

4 0
3 years ago
Find all missing angles in the diagram shown.<br> 4<br> کر)<br> 47°<br> 2<br> 5<br> 522
faltersainse [42]
I don’t see a diagram ? Just numbers...
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3 years ago
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