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beks73 [17]
3 years ago
14

HEELLPP

Mathematics
1 answer:
Lana71 [14]3 years ago
4 0

Answer: 7.8

Step-by-step explanation:

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D. 6.3 cm


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. In the 1980's it was generally believed that congenital abnormalities affected about 5% of the nation's children. Some people
mash [69]

Answer:

the answer is solved in the image below.

Step-by-step explanation:

7 0
3 years ago
1. a. A cube’s volume is 512 cubic units. What is the length of its edge?
Vanyuwa [196]

Answer:

a) The length of its edge is 8 units.

b) The volume of the sphere is approximately 268.083 cubic units.

c) The fraction of the cube that is taken up by the sphere is 0.524, whose equivalent in percentage form is 52.4 %.

Step-by-step explanation:

a) The volume of a cube (V_{c}), measured in cubic units, is defined by the following expression:

V_{c} = L^{3} (1)

Where L is the side length of the cube, measured in units.

If we know that V_{c} = 512\,u^{3}, then the length of its edge is:

L = \sqrt[3]{V_{c}}

L = 8\,u

The length of its edge is 8 units.

b) The volume of a sphere (V_{s}), measured in cubic units, that fits snugly inside this cube is defined by:

V_{s} = \frac{\pi}{6}\cdot L^{3} (2)

If we know that L = 8\,u, then the volume of the sphere is:

V_{s} \approx 268.083\,u^{3}

The volume of the sphere is approximately 268.083 cubic units.

c) The fraction of the cube taken by the sphere is the ratio of the volume of the sphere to the volume of the cube. That is to say:

r = \frac{V_{s}}{V_{c}}

If we know that V_{c} = 512\,u^{3} and V_{s} \approx 268.083\,u^{3}, then the fraction of the cube that is taken up by the sphere is:

r = 0.524

The result in percentage form is calculated by multiplying the result above by 100.

\% r = 52.4\,\%

The fraction of the cube that is taken up by the sphere is 0.524, whose equivalent in percentage form is 52.4 %.

6 0
3 years ago
Factor completely 9x2 42x 49. (3x 7)(3x − 7) (9x − 7)(9x − 7) (3x 7)(3x 7) (9x 7)(9x 7).
sweet-ann [11.9K]

Factors of the given expression by splitting middle term of expression9x^2+42x+49 will be (3x+7) and (3x+7).

Given expression is

9x^2+42x+49

<h3>What is a factor?</h3>

A factor is a number that divides another number leaving no remainder

After we split 42x into 21x each,

The expression looks like,

9x^2+21x+21x+49

3x(3x+7)+7(3x+7)\\

Taking 3x+7 as common

(3x+7) (3x+7)

So factors will be (3x+7) and (3x+7).

Therefore,

Factors of the given expression 9x^2+42x+49 will be (3x+7) and (3x+7).

to get more about factors refer to:

brainly.com/question/25829061

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3 years ago
Determine x:<br> X<br> 2<br> 47°
Usimov [2.4K]
Here is your answer 12°
6 0
3 years ago
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