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Anna71 [15]
2 years ago
13

In a certain town 22 of voters favor a given ballot measure for groups of 21 voters find the variance for the number who favor t

he measure
Mathematics
2 answers:
IceJOKER [234]2 years ago
7 0

Answer:

4.6

Step-by-step explanation:

Allow me to revise your question and hope it will be the same as the original one:

<em>In a certain town 22% of voters favor a given ballot measure for groups of 21 voters find the variance for the number who favor the measure</em>

<em>a. 1.9 </em>

<em>b. 13 </em>

<em>c. 4.6 </em>

<em>d. 3.6</em>

Here is my answer:

Given:

  • 22% of voters favor a given ballot = 0.22
  • Groups of 21 voters

So the variance is: 21*0.22 = 4.6

We choose B

nasty-shy [4]2 years ago
4 0
What is the equation.
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Eliza's backpack weighs 18 and StartFraction 7 over 9 EndFraction pounds with her math book in it. Without her math book, her ba
kati45 [8]

Answer:

Math\ Book = 3\frac{65}{72}\ kg

Step-by-step explanation:

Given

<em />Backpack = 18\frac{7}{9}kg<em> --- with math book</em>

<em />Backpack = 14\frac{7}{8}kg<em> --- without math book</em>

<em />

Required

Determine the weight of her math book

To do this, we simply calculate the difference in the weights given.

Math Book= Backpack(with math book) - Backpack (without math book)

Math\ Book = 18\frac{7}{9} - 14\frac{7}{8}

Math\ Book = \frac{169}{9} - \frac{119}{8}

Take LCM

Math\ Book = \frac{8 * 169 - 9 * 119}{72}

Math\ Book = \frac{1352 - 1071}{72}

Math\ Book = \frac{281}{72}

Math\ Book = 3\frac{65}{72}\ kg

7 0
2 years ago
The volume of a rectangular prism is 2,058 cubic cm. The length of the prism is 3 times the width. The height is twice the width
liraira [26]
Let the width be w, length = 3w and height = 2w

Volume = length x width x height = w x 3w x 2w = 6w^3
6w^3 = 2,058
w^3 = 2,058/6 = 343
w = ∛343 = 7

width = 7 cm
8 0
2 years ago
The weight of a USB flash drive is 30 grams and is normally distributed. Periodically, quality control inspectors at Dallas Flas
vazorg [7]

Answer:

The critical t values are -1.746 and 1.746.

Step-by-step explanation:

Given information:

The weight of a USB flash drive is 30 grams and is normally distributed.

Population mean = 30

Sample size = 17

Sample mean= 31.9

Standard deviation = 1.8

Significance level, α=0.10

Null hypothesis: H_0:\mu=30

Alternative hypothesis: H_1:\mu\neq 30

It is a two tailed test.

The t-critical values for a two-tailed test, for a significance level of α=0.1 are  -1.746 and 1.746.

Therefore the critical t values are -1.746 and 1.746.

5 0
2 years ago
A sampling interval of 10 was used to select a sample from a population of 5,000. how many elements are to be in the sample? a.
attashe74 [19]
 The answer to this either a or c
5 0
2 years ago
The height of a cylinder is twice the radius of its base. A cylinder has a height of 2 x and a radius of x. What expression repr
mrs_skeptik [129]

<u>Given</u>:

Let x represents the radius of the cylinder.

Given that the height of the cylinder is twice the radius of its base.

The height of the cylinder is 2x.

We need to determine the volume of the cylinder.

<u>Volume of the cylinder:</u>

The volume of the cylinder can be determined using the formula,

V=\pi r^2h

Substituting r = x and h = 2x, we get;

V=\pi (x)^2(2x)

Simplifying, we get;

V=\pi x^2(2x)

V=2\pi x^3

Thus, the expression that represents the volume of the cylinder is 2πx³ cubic units.

Hence, Option b is the correct answer.

8 0
2 years ago
Read 2 more answers
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