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3 years ago

Somebody helpl pls what is the approximate area

Mathematics

1 answer:

Serga [27]3 years ago

6 0

Answer:

20.36

Step-by-step explanation:

The area of the whole circle is pi*3.6^2 = 40.715 (rounded). However, the shaded portion is only half of the circle, since the arc is 180 degrees, so we divide this by 2 to get about 20.36.

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What's the area and perimeter of a right triangle with sides 5, 12 and 13( 5 and 12 are the base and height)

uysha [10]

Perimeter is 30
Area is also 30.

Add the numbers to get the perimeter and then use 1/2bh to get the area.

7 0

3 years ago

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Find x so that x, X +2, X'+3 are the first three terms of a geometric sequence. Then find the 5" term of the

velikii [3]

Answer:

The fifth term is -1/4.

Step-by-step explanation:

We know that the first three terms of the geometric sequence is x, x + 2, and x + 3.

So, our first term is x.

Then our second term will be our first term multiplied by the common ratio r. So:

$x+2=xr$

And our third term will be our first term multiplied by the common ratio r twice. Therefore:

$x+3=xr^2$

Solve for x. From the second term, we can divide both sides by x:

$\displaystyle r=\frac{x+2}{x}$

Substitute this into the third equation:

$\displaystyle x+3=x\Big(\frac{x+2}{x}\Big)^2$

Square:

$\displaystyle x+3 = x\Big( \frac{(x+2)^2}{x^2} \Big)$

Simplify:

$\displaystyle x+3=\frac{(x+2)^2}{x}$

We can multiply both sides by x:

$x(x+3)=(x+2)^2$

Expand:

$x^2+3x=x^2+4x+4$

Isolate the x:

$-x=4$

Hence, our first term is:

$x=-4$

Then our common ratio r is:

$\displaystyle r=\frac{(-4)+2}{-4}=\frac{-2}{-4}=\frac{1}{2}$

So, our first term is -4 and our common ratio is 1/2.

Then our sequence will be -4, -2, -1, -1/2, -1/4.

You can verify that the first three terms indeed follow the pattern of x, x + 2, and x + 3.

So, our fifth term is -1/4.

4 0

3 years ago

Which is the closest approximation to the area of the circle?

Arte-miy333 [17]

A. 6082
B.120687
C.1188228
D.19042587

4 0

2 years ago

A Circle has a diameter of 9 cm. Find the Circumference. Give a Simplified Exact answer. Enter pi with answer. For example 4pi

lutik1710 [3]

Circumference = Diameter * $\pi$

So 9 $\pi$ is the answer

3 0

3 years ago

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12/11k÷4/3k simplify the fraction

Nonamiya [84]

Answer:

9/11

Step-by-step explanation:

12/11k÷4/3k

Copy dot flip

12/11k* 3k/4

36k / 44k

Divide the top and bottom by 4k

9/11

3 0

2 years ago

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