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olga2289 [7]
3 years ago
6

Dr. King was born in Atlanta, Georgia. What is the distance in miles from Washington, DCto Atlanta, Georgia?

Mathematics
1 answer:
pochemuha3 years ago
4 0

Answer:

639.4 miles

Step-by-step explanation:

Gmaps

I don't know if you mean straight miles or road/highway miles.

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Given that sin(x)= 7/11, find cos(90-x)
marta [7]
Yes indeed it is 7/11
6 0
3 years ago
Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. Th
Verizon [17]

Answer:

(21.9-19.8) -1.966\sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 1.422

(21.9-19.8) -1.966 \sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 2.778

And we are 95% confident that the true difference means are between 1.422 \leq \mu_1 -\mu_2 \leq 2.778

Step-by-step explanation:

We know the following info:

\bar X_1 = 21.9 sample mean for group 1

\bar X_2 = 19.8 sample mean for group 2

s_1 = 3.4 sample standard deviation for group 1

s_2 = 3.5 sample standard deviation for group 2

n_1 = 200 sample size group 1

n_2 = 200 sample size group 2

We want to find a confidence interval for the difference of means and the correct formula to do this is:

(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}

Now we just need to find the critical value. The confidence level is 0.95 then the significance is 1-0.95 =0.05 and \alpha/2 =0.025. The degrees of freedom are given by:

df= n_1 +n_2 -2= 200+200-2= 398

The critical value for this case would be :t_{\alpha/2}=1.966  

And replacing into the confidence interval formula we got:

(21.9-19.8) -1.966\sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 1.422

(21.9-19.8) -1.966 \sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 2.778

And we are 95% confident that the true difference means are between 1.422 \leq \mu_1 -\mu_2 \leq 2.778

5 0
3 years ago
The sample means for three samples of 20 are shown in the table. graph Compute the variation of each predicted population mean f
Lyrx [107]

Answer:

Step-by-step explanation:

Sample 1 :1.5

Sample 2:-2.5

sample 3:5.5

6 0
3 years ago
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Semenov [28]

Answer:

1/20

Alternate from 0.05, 20 - 1

Hope this helps

7 0
3 years ago
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If a quadratic has x-intercepts at (-1,0) and (6,0), what would be the factored form of the equation?
Roman55 [17]

Answer:

(x+1)(x-6)

Step-by-step explanation:

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