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enot [183]
3 years ago
11

A set of two concentric circles is shown above. What is the area of the shaded portion above?

Mathematics
1 answer:
algol133 years ago
4 0

Answer:

The answer is "44 \ m^2"

Step-by-step explanation:

R=4.5 \ m \\\\r=2.5\ m\\\\

The area between two concentrated circles via an exterior circle radius R and an internal circle

r =\pi(R^2-r^2)

The region, therefore, consists of two concentrated circles with radii of 4.5 m and 2.5 m.

r=\pi(4.5^2 -2.5^2)\\\\

  =\frac{22}{7} (20.25-6.25) \\\\ =\frac{22}{7} (14) \\\\=22 \times 2 \\\\ =44 \ m^2

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What decimal is equal 35%
iren [92.7K]

Answer:

0.35

Step-by-step explanation:

Divide 35 by 100 and you get 0.35

8 0
4 years ago
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The perimeter of a rectangle is 36 menters. The length of the rectangle is 4 meters longer than the width. Find the length and t
cupoosta [38]

Answer:

11 m and 7 m

Step-by-step explanation:

Width = x

Length = x+4

P=2L+2W

P=2(x+4) + 2x=4x +8

36 = 4x + 8

4x = 28

x=7  Width

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7 0
3 years ago
Find the distance between the points (3, –8) and (0, –9).
nadezda [96]

The formula for distance between two points is:

\sqrt{(x_{2} -x_{1})^{2} + (y_{2} -y_{1})^{2}}

In this case:

x_{2} =0\\x_{1} =3\\y_{2} =-9\\y_{1} =-8

^^^Plug these numbers into the formula for distance like so...

\sqrt{(0-3)^{2} + (-9 - (-8))^{2}}

To solve this you must use the rules of PEMDAS (Parentheses, Exponent, Multiplication, Division, Addition, Subtraction)

First we have parentheses. Remember that when solving you must go from left to right

\sqrt{(0-3)^{2} + (-9-(-8))^{2}}

0 - 3 = -3

\sqrt{(-3)^{2} + (-9-(-8))^{2}}

-9 - (-8) = -1

\sqrt{(-3)^{2} + (-1)^{2}}

Next solve the exponent. Again, you must do this from left to right

\sqrt{(-3)^{2} + (-1)^{2}}

(-3)² = 9

\sqrt{9 + (-1)^{2}}

(-1)² = 1

\sqrt{(9+1)}

Now for the addition

\sqrt{(9+1)}

9 + 1 = 10

√10 <<<This can not be further simplified so this is your exact answer

Your approximate answer would be about 3.16

***Remember that the above answers are in terms of units

Hope this helped!

~Just a girl in love with Shawn Mendes

4 0
3 years ago
I need help with this and pleases explain this its due today
Gwar [14]

Answer:

1. x= 20/3 or 6.6666 repeating

2. x=3

3. a=39

Step-by-step explanation:

1. subtract 25 by 5 to get 20, then divide 20 by 3 to get x

2. divide 7 by 21 to get x

3. add 8 to 31 to get a equals 39

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3 years ago
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I give brain please help
Snowcat [4.5K]

Answer:

It’s an open circle, so it’s

x > 4

Step-by-step explanation:

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