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Veseljchak [2.6K]

3 years ago

5

In a survey, 31 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped

with a mean of $49 and standard deviation of $8. Find the margin of error at a 80% confidence level. Give your answer to two decimal places.

1 answer:

Andrei [34K]3 years ago

7 0

Answer:

Step-by-step explanation:

i would help you but i dont know , sorry

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Aneli [31]

Answer:

8/5

Step-by-step explanation:

4 0

3 years ago

Need help finding the value for A

Monica [59]

Answer:

$\text{n}(A \bigcup B)$ = 6.

Step-by-step explanation:

We are given that n(A) = 4, n(B) = 5, and $\text{n}(A \bigcap B)$ = 3.

And we have to find the value of $\text{n}(A \bigcup B)$ .

<u>As we know that the union formula is given by;</u>

$\text{n}(A \bigcup B) = \text{n}(A) + \text{n}(B) - \text{n}(A \bigcap B)$

Now, substituting the values given in the question in the above formula, we get;

$\text{n}(A \bigcup B) = 4+5-3$

$\text{n}(A \bigcup B) = 9-3$

$\text{n}(A \bigcup B) = 6$

Hence, the value of $\text{n}(A \bigcup B)$ = 6.

6 0

3 years ago

5k^3-8-4k^2+5k^2-2+3k^3

lara31 [8.8K]

<h3>I'll teach you how to solve 5k^3-8-4k^2+5k^2-2+3k^3</h3>

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5k^3-8-4k^2+5k^2-2+3k^3

Group like terms:

5k^3+3k^3-4k^2+5k^2-8-2

Add similar elements:

5k^3+3k^3+k^2-8-2

Add similar elements:

8k^3+k^2-8-2

Subtract the numbers:

8k^3+k^2-10

Your Answer Is 8k^3+k^2-10

Plz mark me as brainliest :)

7 0

3 years ago

!!!!PLEASE HELP!!!

DaniilM [7]

Answer:

a^2 + b^2 = c^2

a^2 + 32^2 = 58^2

a^2 + 1024 = 3364

a^2 = 2340

a = 48.37

Step-by-step explanation:

5 0

3 years ago

Find the area of a circle with a diameter of 16.

tangare [24]

Answer:

Step-by-step explanation:

Area of circle:

<em>area = π · r · r</em>

<em>Radius= </em> $\frac{16}{2}$ = 8

$3.14\times { 8 }^{ 2 }$ = 200.96 $cm^2\\$

<em></em>

8 0

2 years ago