The flat surfaces of a 3D shape are called what? Faces Edges Vertices

www.g The physical plant at the main campus of a large state university recieves daily requests to replace fluorescent lightbulb

damaskus [11]

Answer:

$z=\frac{24-40}{8}=-2$

$z=\frac{40-40}{8}=0$

And then the percentage between 24 and 40 would be $\frac{95}{2}= 47.5 \%$

Step-by-step explanation:

For this problem we have the following parameters given:

$\mu = 40, \sigma =8$

And for this case we want to find the percentage of lightbulb replacement requests numbering between 24 and 40.

From the empirical rule we know that we have 68% of the values within one deviation from the mean, 95% of the values within 2 deviations and 99.7% within 3 deviations.

We can find the number of deviations from themean for the limits with the z score formula we got:

$z=\frac{X-\mu}{\sigma}$

And replacing we got:

$z=\frac{24-40}{8}=-2$

$z=\frac{40-40}{8}=0$

And then the percentage between 24 and 40 would be $\frac{95}{2}= 47.5 \%$

5 0

2 years ago

What is x for y=mx+b

Hoochie [10]

Y and x are the variables

6 0

3 years ago

A survey claims that a college graduate from Smith College can expect an average starting salary of $ 42,000. Fifteen Smith Coll

jek_recluse [69]

<h2>Answer with explanation:</h2>

Let $\mu$ be the average starting salary ( in dollars).

As per given , we have

$H_0: \mu=42000\\\\ H_a:\mu$

Since $H_a$ is left-tailed , so our test is a left-tailed test.

WE assume that the starting salary follows normal distribution .

Since population standard deviation is unknown and sample size is small so we use t-test.

Test statistic : $t=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}$ , where n= sample size , $\overline{x}$ = sample mean , s = sample standard deviation.

Here , n= 15 , $\overline{x}= 40,800$ , s= 225

Then, $t=\dfrac{40800-42000}{\dfrac{2250}{\sqrt{15}}}\approx-2.07$

Degree of freedom = n-1=14

The critical t-value for significance level α = 0.01 and degree of freedom 14 is 2.62.

Decision : Since the absolute calculated t-value (2.07) is less than the critical t-value., so we cannot reject the null hypothesis.

Conclusion : We do not have sufficient evidence at 1 % level of significance to support the claim that the average starting salary of the graduates is significantly less that $42,000.

3 0

2 years ago

Help pls I’m in trouble I need this

nexus9112 [7]

Answer:

We conclude that:

g(-3) = 3.5

Step-by-step explanation:

Some background Concepts:

From the graph, it is clear that at x = -10, the graph intersects the x-axis.

So, the x-intercept of the graph is (-10, 0).

It means g(-10) = 0

From the graph, it is clear that at y = 5, the graph intersects the y-axis.

So, the y-intercept of the graph is (0, 5).

It means g(0) = 5

Determining g(-3):

From the graph, it is clear that at x = -3, the value of the function output = 3.5.

In other words,

at x = -3, g(-3) = 3.5

Therefore, we conclude that:

g(-3) = 3.5

8 0

2 years ago

A six-sided number cube is rolled 600 times. The results are 246 even numbers and 354 odd numbers.

Simora [160]

Answer:

the answer is B

Step-by-step explanation:

just trust

7 0

2 years ago