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drek231 [11]
3 years ago
13

99 POINTS!

Mathematics
2 answers:
laila [671]3 years ago
6 0

Standard deviation = √(n * p * q)

You are given n and p

q = 1 - p

q = 1 -0.2 = 0.8

Standard deviation = √(21 * 0.2 * 0.8)

=√3.36 = 1.83

The answer is A.

Andrews [41]3 years ago
5 0

The standard deviation for a given binomial distribution n and p would be the following:

\sigma=\sqrt{n \times p \times q}

The variable q is equivalent to (p-1)

=\sqrt{n\times p\times(p-1)}

Substitute the values of p and n into the equation

=\sqrt{21\times0.2\times(1-0.2)}

=\sqrt{21\times0.2\times0.8}

Use a calculator to solve for this square root since it would be too hard and complicated to do by hand

=1.83303027798...

Round this to the nearest hundredths place since all answer choices are rounded like that

=1.83

Thus, the answer is choice A. Let me know if you need any clarifications, thanks!

~ Padoru

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If the range of the function f(x) = 7x – 2.7 is {14.1, 30.9, 41.4, 58.9, 68}, what is its domain?
Drupady [299]

domain is {2.4, 4.8, 6.3, 8.8, 10.1 }

For domain, equate f(x) to each value in the range and solve for x

7x - 2.7 = 14.1 ⇒ x = \frac{x14.1 + 2.7}{7} = 2.4

7x - 2.7 = 30.9 ⇒ x = \frac{30.9 + 2.7}{7} = 4.8

7x - 2.7 = 41.4 ⇒ x = \frac{41.4 + 2.7}{7} = 6.3

7x - 2.7 = 58.9 ⇒ x = \frac{58.9 + 2.7}{7} = 8.8

7x - 2.7 = 68 ⇒ x = \frac{68 + 2.7}{7} = 10.1


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3 years ago
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koban [17]

Answer:

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Write a function g whose graph represents a reflection in the y-axis of the graph of f(x)=−3+|x−11|.
Jet001 [13]

The function g whose graph represents a reflection in the y-axis of the graph of f(x)=−3+|x−11| is; g(x) = x + 8

<h3>How to solve transformation problems?</h3>

Transformations are used to change the position of a function from one point to another.

Now, we are given the function as;

f(x) = -3 + |x - 11|

To reflect the function above across the y-axis, we will make use of the following transformation rule: (x, y) → (-x, y)

Thus, since we are given f(x) = -3 + |x - 11|, applying the transformation rule above gives us;

f(-x) = -3 + |-1(x - 11)|

Removing the absolute sign gives us;

f(-x) = -3 + x + 11

f(-x) = x + 8

Thus, the function g whose graph represents a reflection in the y-axis of the graph of f(x)=−3+|x−11| is; g(x) = x + 8

Read more about Transformations at; brainly.com/question/4289712

#SPJ1

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Serjik [45]

TRIGONOMETRIC  \:  \: RESOLUTIONS

Heya !

Check the attachment.
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