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Stella [2.4K]
3 years ago
15

What is the area of the partial circle with a radius of 8 cm?

Mathematics
2 answers:
lina2011 [118]3 years ago
8 0

notice, the circle is missing 1/4, so the area of it is just 3/4 of the whole area of the circle.


\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=8 \end{cases}\implies A=\pi 8^2\implies A=64\pi \\\\\\ \stackrel{whole}{\cfrac{4}{4}}-\stackrel{one~quarter}{\cfrac{1}{4}}=\cfrac{3}{4}~\hfill \cfrac{3}{4}\cdot 64\pi \implies 48\pi \implies \stackrel{\pi =3.14}{150.72} \\\\\\ ~\hspace{34em}

belka [17]3 years ago
5 0

Answer: Just took the test and got the answer!! Step-by-step explanation: Look at the image down below ♡\( ̄▽ ̄)/♡


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the difference between two numbers is 10 and their sum is four times the smaller number. find the two numbers
Vanyuwa [196]

Answer:

The smaller number is 5.

The bigger number is 15.

Step-by-step explanation:

Let the smaller number be x and the bigger number be x+10.

x+x+10 = 4x

2x+10 = 4x

10 = 4x-2x

2x = 10

x = 10÷2

  = 5

x+10 = 5+10

       = 15

8 0
3 years ago
Please help me find the values of these irraational numbers on a number line!!!
uranmaximum [27]
Here, You have to simplify every number to their simple form and place it on the arrow by approximation:

So, Here is your answers:

Upper Arrows (From Left towards right):
1st = -10√2/3
2nd = -√7
3rd = ∛4
4th = √50

Lower Arrows (From Left towards right):
1st = -√99
2nd = -√17
3rd = ∛9
4th = π

Hope this helps!
7 0
3 years ago
Please help ...........​
sammy [17]

Answer:

Angle B = 80°

see attachment......

7 0
3 years ago
Identify the roots of the function g(x) = x^2 - 8x + 16
amm1812
Only 4 because result is (x-4)(x-4) that means (x-4)^2=0
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8 0
4 years ago
Find X using the image.
Temka [501]

9514 1404 393

Answer:

  x = 2

Step-by-step explanation:

The square of the tangent is equal to the product of the secant lengths to the near and far circle intersections.

  (x +4)² = (2x -1)(2x -1 +9)

  0 = (2x -1)(2x +8) -(x +4)² = (4x² +14x -8) -(x² +8x +16)

  0 = 3x² +6x -24 = 3(x² +2x -8) = 3(x +4)(x -2)

This has solutions x = -4 and x = 2. Only the latter works in this geometry.

  x = 2

7 0
3 years ago
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