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2 years ago

If 2sinθ=65, what is cos(90°−θ)? A 3/5 B 4/5 C 5/4 D 5/3

Mathematics

1 answer:

Law Incorporation [45]2 years ago

7 0

Answer: A

Step-by-step explanation:

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The weekly salaries of sociologists in the United States are normally distributed and have a known population standard deviation

Lostsunrise [7]

Answer:

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

The confidence level is 0.98 and the significance is $\alpha=1-0.98 =0.02$ and $\alpha/2 =0.01$ and the critical value using the table is:

$z_{\alpha/2}= 2.326$

And replacing we got:

$ME=2.326 \frac{425}{\sqrt{22}}= 210.760\ approx 210.76$

Step-by-step explanation:

For this case we have the following info given:

$\sigma = 425$ represent the population deviation

$n =22$ the sample size

$\bar X =1520$ represent the sample mean

We want to find the margin of error for the confidence interval for the population mean and we know that is given by:

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

The confidence level is 0.98 and the significance is $\alpha=1-0.98 =0.02$ and $\alpha/2 =0.01$ and the critical value using the table is:

$z_{\alpha/2}= 2.326$

And replacing we got:

$ME=2.326 \frac{425}{\sqrt{22}}= 210.760\ approx 210.76$

3 0

2 years ago

What is the length of each side of a square that has the same areas as the rectangle below? Round to the nearest tenth. Height:

NikAS [45]

I feel like the answer is c

3 0

3 years ago

Help help !! Please

JulijaS [17]

Answer:

mean = 70000

SD = 15239

X= 95000

Z = (X-mean)/ SD

= (95000-70000)/15239

= 1.64

Now from Z-Table

% of employees = 100(1-.9495) = 5.02%

8 0

3 years ago

HELPP RUNNING OUT OF TIME

Semenov [28]

$6^{3}=216$

Therefore answer is B.

$6^{0}=1$
$6^{1}=6$
$6^{2}=36$
$6^{4}=1296$

3 0

3 years ago

Read 2 more answers

How to write 321,209 in word form

alexandr1967 [171]

three hundred thousand twenty-one two hundred nine

6 0

3 years ago

Read 2 more answers