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1 year ago

12 ft

Mathematics

1 answer:

lara31 [8.8K]1 year ago

3 0

Answer:

942.48

Step-by-step explanation:

hope this helps

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in a 3 digit number, the hundreds digit is four more than the units digit, and the tens digit is 3 less than the sum of the othe

Snowcat [4.5K]

Answer: The number is 480.

Step-by-step explanation:

The question states that in a 3 digit number, the hundreds digit is 4 more than the units digit and the tens digit is twice the hundreds digit.

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2 years ago

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What is the approximate percent change in a temperature that went down from 120 degrees to 100 degrees?

Mumz [18]

(120-100)/120
=20/120
=16.66666666
=17%

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Write the equation of the line in either point-slope form or slope-intercept form.

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Answer:

y = -3x - .25 or y = -3x + -.25

Step-by-step explanation:

y = slope (x) + y-intercept

-4 = -3(1.25)+b

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The average daily volume of a computer stock in 2011 was ų=35.1 million shares, according to a reliable source. A stock analyst

Shtirlitz [24]

Answer:

The null hypothesis is $H_o : \mu = 35 .1 \ million \ shares$

The alternative hypothesis $H_a : \mu \ne 35.1\ million \ shares$

The 95% confidence interval is $27.475 < \mu < 37.925$

Step-by-step explanation:

From the question the we are told that

The population mean is $\mu = 35.1 \ million \ shares$

The sample size is n = 30

The sample mean is $\= x = 32.7 \ million\ shares$

The standard deviation is $\sigma = 14.6 \ million\ shares$

Given that the confidence level is $95\%$ then the level of significance is mathematically represented as

$\alpha = 100-95$

$\alpha = 5\%$

=> $\alpha = 0.05$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table

The value is $Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{ \sigma }{\sqrt{n} }$

substituting values

$E = 1.96 * \frac{ 14.6 }{\sqrt{30} }$

$E = 5.225$

The 95% confidence interval confidence interval is mathematically represented as

$\= x -E < \mu < \= x +E$

substituting values

$32.7 - 5.225 < \mu < 32.7 + 5.225$

$27.475 < \mu < 37.925$

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