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iren [92.7K]
3 years ago
11

A group of randomly sampled students gave the following response when they were asked how many siblings they had: 1, 1, 4, 2, 1,

2, 1, 1, 1, 3, 1, 3, 5, 1, 2, 3, 1, 1, 3, 2. What percentage of the sampled students have three or more siblings at home
Mathematics
1 answer:
sergiy2304 [10]3 years ago
3 0

30% of the sampled students <u>have three or more siblings</u> at home.

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

<u>step 1</u> : The total number of students sampled = 20 students.

<u>step 2</u> : The students having three or more siblings = 6 students.

The question asks for what percentage of the sampled students have three or more siblings.

<u>step 3</u> : Let the unknown percentage be X%

X% of total sampled student = students having 3 or more siblings

(X/100) \times 20 = 6 students.

2x = 6\times10

x = \frac{60}{2}

x = 30 %  

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A cylinder with a height of 12 cm is inscribed in a sphere with a radius of 10 cm. Find the lateral area of the cylinder. Answer
zalisa [80]

Answer:

256π

Step-by-step explanation:

Given that:

The height of the cylinder: 12 cm

The radius of the sphere : 10

Let r is the radius of the cylinder, use Pytagon

10² = r² + 6²

<=> r²  = 10² - 6²  = 64

<=> r = 8

Hence,  the lateral area of the cylinder

L= 2πrh

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4 0
3 years ago
The diagram show a 5cm x 6cm x 7cm cuboid pls help you
kotegsom [21]

Answer:

d ≈ 10.5

Step-by-step explanation:

The formula for the diagonal of a retangular prism (cuboid) is

d=\sqrt{l^2+w^2+h^2}

1.) Plug in all the values for l, w, and h

d=\sqrt{5^2+6^2+7^2}

2.) simplify by squaring the terms inside the square root

5 * 5 = 25

6 * 6 = 36

7 * 7 = 49

d=\sqrt{25+36+49}

3.) Add the terms

d=\sqrt{110}

4.) Simplify

d = 10.488

5.) Round to one decimal place

d ≈ 10.5

5 0
3 years ago
Solve the system by subtitution y = 3x + 18 y = 5x
elena-14-01-66 [18.8K]

Answer:

x=9

Step-by-step explanation:

y=3x+18=5x

thus 3x+18=5x

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3 0
2 years ago
-4 (5y + 5) = -120 y =
Sedbober [7]

-4 (5y + 5) = -120

multiply the bracket by -4

(-4)(5y)=-20y

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-20y-20+20=-120+20

-20y=-120+20

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divide both sides by -20 to get y by itself

-20y/-20=-100/-20

Answer: y=5

6 0
3 years ago
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