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hjlf
3 years ago
11

An engineer is planning a new water pipe installation. The circular pipe has a diameter of d=20\text{ cm}d=20 cmd, equals, 20, s

tart text, space, c, m, end text.
What is the area AAA of the circular cross section of this pipe?
Mathematics
1 answer:
Artyom0805 [142]3 years ago
6 0

Answer:

314 square cenntimeters

Step-by-step explanation:

Area of the circular cross-section of the pipe = πd²/4

Given that;

d = 20cm

Area = π(20)²/4

Area = 400π/4

Area = 100π

Area = 100(3.14)

Area = 314cm²

Hence the area of the circular cross-section of this pipe is 314 square cenntimeters

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Answer:

0.000005832 m³

Step-by-step explanation:

V = L²

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= 5832 mm³

= 0.000005832 m³

8 0
3 years ago
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Find the slope of the line through each pair of points (-17, 11) , (-12, 9) 
ad-work [718]

Answer:

M = -2/5

Step-by-step explanation:

To find the slope of a line when you know two points, use the following formula.

M = y₂ - y₁ ÷ x₂ - x₁

M = 9 - 11 ÷ -12 - (-17)

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Hope that helps.

3 0
3 years ago
1. Quadrilateral EFGH is an isosceles trapezoid. If mG is four times mH, what is mE? A)18° C)72° D)144° B)36°​
Maslowich

Answer:

<E = 36 degrees (Answer B)

Step-by-step explanation:

Recall that the addition of all internal angles in a quadrilateral must equal 360 degrees. Then we can write the equation that states this as:

<E + <F + <G + <H = 360

Notice as well that we are dealing with an isosceles trapezoid, so there is a symmetry along the line that passes through the midpoints of sides FG and EH (the two bases). That means that the measures of angles <F = <G  and <E = <H .

The previous equation then can be written as:

<H + <G + <G + <H = 360

Also, since we are told that <G = 4 <H, we can use this info in the equation as shown below:

<H + 4 <H + 4 <H + <H = 360

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divide both sides by 10 to isolate <H

<H = 360 / 10

<H = 36

Since as we mentioned, <E equals <H, we can state that

the measure of <E = 36 degrees (Answer B)

3 0
3 years ago
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7 0
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BigorU [14]

Answer:

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19) choice 3) 2

20) choice 3

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Step-by-step explanation:

3 0
3 years ago
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