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JulijaS [17]
3 years ago
8

Please help me. this is hard

Mathematics
1 answer:
allochka39001 [22]3 years ago
7 0
Since it is a square that means each side is equal.
The perimeter is 24, and since there is four sides we would divide it by four to find the length of each side.

24/4 = 6

Each side is 6.
By looking at the picture, one side of the square, is the length of the radius.

The radius of the square is 6.

The only thing left to do is to find the circumference.
The circumference formulas are:

C = \pid
C = 2\pir

We can use the first one Diameter x pi (3.14)
To find the diameter we would just multiply the radius by two.

6 x 2 = 12

Diameter = 12

So multiply it by pi

12 x 3.14 = 37.68
or D 12\pi



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66 I am pretty sure hope this helps :)
4 0
3 years ago
Please help me. I need help
mel-nik [20]
<h3>Answer:</h3>

  a.  -(3√13)/13

<h3>Step-by-step explanation:</h3>

The cosine can be found from the tangent by way of the secant.

  tan(θ)² +1 = sec(θ)² = 1/cos(θ)²

Then ...

  cos(θ) = ±1/√(tan(θ)² +1)

The <em>cosine is negative in the second quadrant</em>, so we will choose that sign.

  cos(θ) = -1/√((-2/3)² +1) = -1/√(4/9 +1) = -1/√(13/9)

  cos(θ) = -3/√13 = -(3√13)/13 . . . . . matches your selection A

3 0
3 years ago
Read 2 more answers
What the volume of the soild
Montano1993 [528]

Answer:

A.264

Step-by-step explanation:

((Area Of triangle*height)=Volume

Area of triangle is the base of the triangle multiplied by height of triangle divided by 2

((8*6)/2)*11=264

8 0
2 years ago
Is DE parallel to AB? Show your work to receive full credit.
Svetllana [295]

Answer:

DE is parallel to AB, ∠ACB =∠DCE. So from symmetry of triangle. Δ DCE and Δ ABC are symmetric

8 0
3 years ago
Please help. I don't know how to do this and I need help fast!
Leya [2.2K]

Answer:

The answer is 2 scoops.

Step-by-step explanation:

The first step to answering this problem would be to find the volumes of the cylinder and cone.

Volume of the cylinder:

The equation for the volume of a cylinder is V = πr²h where V is the volume of the cylinder, π is pi, r is the radius of the base, and h is the height of the cylinder. We already know the height, it is 24 inches. But what is the radius? Remember, the radius is half of the diameter, so the radius would be half of 8 inches which is 4 inches. The radius is 4 inches. Now plug the height and radius into the equation.

V = π(4²)(24)

   = 384π (We will leave the pi there.)

Now the volume of the cone:

The equation for the volume of a cone is V = πr²(h/3). And like in the cylinder, V is the volume, π is pi, h is the height, and r is the radius. We know that h is 16. R is half of the diameter, so r is 6. Plug in r and h into the equation.

V = π(6²)(16/3)

   = 192π (Again, we will leave the pi there.)

Now solve for the answer:

To solve for the answer, divide the volume of the cylinder by the volume of the cone.

384π ÷ 192π = 2 (This is why we left the pi there. Now it is easier to divide.)

The answer is 2 scoops.

I hope this helps. Let me know if you have any questions. :)

4 0
3 years ago
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