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2 years ago

Help ASAP show work please thank you

Mathematics

1 answer:

xenn [34]2 years ago

8 0

Answer:

log₉2873 ≈ 3.6242

Step-by-step explanation:

First off all you can estimate by applying a fundamental property of a logarithm

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What is the y-intercept of a line that has a slope of –3 and passes through point (–5, 4)? –17 , –11 , 7 , 19

Sindrei [870]

Hey there! :)

Answer:

b = -11.

Step-by-step explanation:

Create an equation in slope-intercept form to solve for the intercept:

y = mx + b

Plug in the slope and point values:

4 = -3(-5) + b

Simplify:

4 = 15 + b

Solve for b:

-11 = b

b represents the y-intercept, therefore:

y-intercept = -11

3 0

3 years ago

Read 2 more answers

An engineer wishes to determine the width of a particular electronic component. If she knows that the standard deviation is 1.6

nexus9112 [7]

Answer:

n=1705

Step-by-step explanation:

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Assuming the X follows a normal distribution

$X \sim N(\mu, \sigma=1.6)$

And the distribution for $\bar X$ is:

$\bar X \sim N(\mu, \frac{1.6}{\sqrt{n}})$

We know that the margin of error for a confidence interval is given by:

$Me=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

The next step would be find the value of $\z_{\alpha/2}$ , $\alpha=1-0.99=0.01$ and $\alpha/2=0.005$

Using the normal standard table, excel or a calculator we see that:

$z_{\alpha/2}=\pm 2.58$

If we solve for n from formula (1) we got:

$\sqrt{n}=\frac{z_{\alpha/2} \sigma}{Me}$

$n=(\frac{z_{\alpha/2} \sigma}{Me})^2$

And we have everything to replace into the formula:

$n=(\frac{2.58(1.6)}{0.1})^2 =1704.03$

And if we round up the answer we see that the value of n to ensure the margin of error required $\pm=0.1$ mm is n=1705.

6 0

2 years ago

Helpppppppppppppppppppppppp

nirvana33 [79]

I’d say 21 and -1 :)
21 * -1 = -21
21 - 1 = 20

5 0

2 years ago

Read 2 more answers

A cube has and edge length of 2 centimeters. What is it’s volume, in cubic centimeters?

77julia77 [94]

Answer:

Step-by-step explanation:

2x2 is 4 and x 2 is 8. I think im right?

5 0

3 years ago

68.64 is 78% of what

icang [17]

53.5392 is the answer

6 0

3 years ago