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3 years ago

Help me and I'll mark brainiest

Mathematics

2 answers:

3241004551 [841]3 years ago

4 0

Answer:

$425

Step-by-step explanation:

because the closest to 400$ is 425. hope this helps

zalisa [80]3 years ago

3 0

Answer:

Approximately $425

Step-by-step explanation:

I've gone ahead and added a trend line of my own to the graph by connecting the first and last points of the scatter plot. Following that line, we can see that at temperature = 20, the closest approximation from the list is $425.

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A 20-foot ladder is leaning against a building. If the bottom of the ladder is sliding along the pavement directly away from the

zaharov [31]

Answer: The top of the ladder is moving down at a rate of 0.303 feet / second

Step-by-step explanation: Please see the attachments below

7 0

3 years ago

The USDA conducted tests for salmonella in produce grown in California. In an independent sample of 252 cultures obtained from w

Marat540 [252]

Answer:

The decision rule is

Fail to reject the null hypothesis

The conclusion is

There no sufficient evidence to show that the proportion of salmonella in the region’s water differs from the proportion of salmonella in the region’s wildlife

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 252$

The number that tested positive is $k_1 = 18$

The second sample size is $n_2 = 476$

The number that tested positive is $k_2 = 20$

The level of significance is $\alpha = 0.01$

Generally the first sample proportion is mathematically represented as

$\^ p _1 = \frac{k_1 }{ n_1 }$

=> $\^ p _1 = \frac{18 }{ 252 }$

=> $\^ p _1 = 0.071$

Generally the second sample proportion is mathematically represented as

$\^ p _2 = \frac{k_2 }{ n_2 }$

=> $\^ p _2 = \frac{20 }{ 476}$

=> $\^ p _2 = 0.042$

The null hypothesis is $H_o : p_1 - p_2 = 0$

The alternative hypothesis is $H_a : p_1 - p_2 \ne 0$

Generally the test statistics is mathematically represented

$z = \frac{ \^ p_1 - \^ p_2 - ( p_ 1 - p_2 )}{ \sqrt{\frac{\^ p_1 (1-\^ p_1)}{ n_1 } + \frac{\^ p_2 (1-\^ p_2)}{ n_2 } } }$

=> $z = \frac{ 0.071 - 0.042 - 0 }{ \sqrt{\frac{0.071 (1-0.071)}{ 252 } + \frac{0.042 (1-\^ 0.042)}{ 476 } } }$

=> $z = 1.56$

From the z table the area under the normal curve to the right corresponding to 1.56 is

$P(Z > 1.56 ) =0.05938$

Generally the p-value is mathematically represented as

$p-value = 2 * P(Z > 1.56 )$

=> $p-value = 2 * 0.05938$

=> $p-value = 0.1188$

From the value obtained we see that $p-value > \alpha$ hence

The decision rule is

Fail to reject the null hypothesis

The conclusion is

There no sufficient evidence to show that the proportion of salmonella in the region’s water differs from the proportion of salmonella in the region’s wildlife

5 0

3 years ago

What is the correct answer?

vodka [1.7K]

Answer:

B) 3

Step-by-step explanation:

This is because they are both circles and they each have the same equation for circumference. C=2πr

So that if pi stays x 2 then the perimeter will still be 3 x as big as the smaller circle. Which means it takes 3 full turns as to turn around the perimeter.

7 0

3 years ago

Can anyone solve this I really need help

earnstyle [38]

The answer is 12.24745 or 5/6

8 0

3 years ago

Is the following sequence arithmetic? If so, identify the common difference.<br> 8,5, 3, 2, ...

Papessa [141]

Answer:

sequence is not arithmetic

Step-by-step explanation:

Given:

8,5, 3, 2,

above is not arithmetic sequence

As there is constant difference in consecutive terms in a an arithmetic sequence given by:

d=an- an-1

where

d is common difference

an=nth term

an-1=nth - 1 term

Given sequence

8,5, 3, 2,

d=5-8 = -3

d-3-5=-2

as the difference is not common above sequence is not arithmetic!

7 0

4 years ago