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antoniya [11.8K]

4 years ago

12

This table shows the value of a stock at various points in the past 24 months since Carla bought the stock. Write a function tha

t models data
Time(months) 0 4 9 12 15 20 24
Stock value 62 54 45 48 55 53 60

1 answer:

Sedbober [7]4 years ago

8 0

Estas bien burra hahahhhha ahhahaah

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A random sample of cats at the SPCA shows that 25 out of the 40 cats are kittens. There are a total of 800 cats at all the anima

Alinara [238K]

Answer: The number of kittens= 500.

Step-by-step explanation:

Given, A random sample of cats at the SPCA shows that 25 out of the 40 cats are kittens.

i.e. ratio of kitten to cats = $\dfrac{25}{40}=\dfrac{5}{8}$

We assume that , the ratio will remains same.

Let x be the number of kitten out of 800 , then we have

$\dfrac{x}{800}=\dfrac{5}{8}\\\\\Rightarrow\ x=\dfrac{800\times5}{8}=500$

Hence, the number of kittens out of 800 cats= 500.

7 0

3 years ago

A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she

Nataly_w [17]

Answer:

The minimum sample size needed is $n = (\frac{1.96\sqrt{\sigma}}{4})^2$ . If n is a decimal number, it is rounded up to the next integer. $\sigma$ is the standard deviation of the population.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How large a sample must she select if she desires to be 90% confident that her estimate is within 4 ounces of the true mean?

A sample of n is needed, and n is found when M = 4. So

$M = z\frac{\sigma}{\sqrt{n}}$

$4 = 1.96\frac{\sigma}{\sqrt{n}}$

$4\sqrt{n} = 1.96\sqrt{\sigma}$

$\sqrt{n} = \frac{1.96\sqrt{\sigma}}{4}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{\sigma}}{4})^2$

$n = (\frac{1.96\sqrt{\sigma}}{4})^2$

The minimum sample size needed is $n = (\frac{1.96\sqrt{\sigma}}{4})^2$ . If n is a decimal number, it is rounded up to the next integer. $\sigma$ is the standard deviation of the population.

4 0

3 years ago

Circle A is inscribed in a quadrilateral. What is the perimeter of the quadrilateral?

faust18 [17]

AB + CD = BC + DA
<span>Where A, B, C, and D are points on the quad, and AB is the length of the line A to B, etc. </span>

<span>Since you know three sides, you can easily solve for the fourth. </span>

6 0

4 years ago

Please answer the top half ASAP I need it in 2h please

NeTakaya

Answer:

4/7
6/11
12/17
19/30
10/17
7/15
11/28
8/21
7/3
23/49
3/7
1/2
4/7
5/22
3/7
3/4
1/3
1/10
3/8
1/2
3/8
4/7
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8/21
40/63
4/3
1/2
9/7
9/5
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4 0

4 years ago

Find the value of x.<br> 6x+3(-3x+4)=13

iren [92.7K]

Answer:

x= -1/3 or -0.3

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers