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3 years ago

Please answer my question

Mathematics

1 answer:

Strike441 [17]3 years ago

8 0

It's kinda blurry and I don't think that's math

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Please help.........................

astraxan [27]

<span>The diameter in centimeters (cm) of a human hair is about 0.0025 cm. In terms of scientific notation, it is written as 2.5 x 1</span><span>0^-3 cm</span>

7 0

3 years ago

Slope????????????????

MAXImum [283]

M = Undefined (because the line is perfectly vertical)

6 0

2 years ago

I am confused still, how would I do this?

White raven [17]

Answer:

yes, its a solution

Step-by-step explanation:

6(-2)+5(1)=-7

-12+5=-7 this is correct

2(-2)-4(1)=-8

-4-4=-8 this is also correct

8 0

2 years ago

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. The mean is found to be 9.8

svetlana [45]

Answer:

The 99% confidence interval for the true mean number of reproductions per hour for the bacteria is between 9.6 and 10.

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:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

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.

$M = 2.575\frac{2.4}{\sqrt{955}} = 0.2$

The lower end of the interval is the sample mean subtracted by M. So it is 9.8 - 0.2 = 9.6 reproductions per hour.

The upper end of the interval is the sample mean added to M. So it is 9.8 + 0.2 = 10 reproductions per hour.

The 99% confidence interval for the true mean number of reproductions per hour for the bacteria is between 9.6 and 10.

8 0

2 years ago

Graph the linear equation by using Slope intercepts form

LUCKY_DIMON [66]

Here is for solving for x

4 0

2 years ago