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3 years ago

I think i may have the answer but im not sure. if you answer thanks sm :)

Mathematics

1 answer:

dalvyx [7]3 years ago

8 0

Answer:

Step-by-step explanation:

3(5) would be the equivalent of 3*5, adding the + n.

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( 3 + 2i ) + ( 6 - 8i )

natta225 [31]

9-6i is the answer, combine like terms

4 0

3 years ago

HighTech Inc. randomly tests its employees about company policies. Last year in the 560 random tests conducted, 26 employees fai

Tanzania [10]

Answer:

The 98% confidence interval for the proportion of applicants that fail the test is (0.025, 0.067).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

560 random tests conducted, 26 employees failed the test. This means that $n = 560, \pi = \frac{26}{560} = 0.046$

98% confidence level

So $\alpha = 0.02$ , z is the value of Z that has a pvalue of $1 - \frac{0.02}{2} = 0.99$ , so $Z = 2.33$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.046 - 2.33\sqrt{\frac{0.046*0.954}{560}} = 0.025$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.046 + 2.33\sqrt{\frac{0.046*0.954}{560}} = 0.067$

The 98% confidence interval for the proportion of applicants that fail the test is (0.025, 0.067).

5 0

3 years ago

A foreign country uses the stellar as its currency. Before a trip to that country, Jon wants to exchange $1,500 to stellars. W

JulsSmile [24]

Answer:

Bank A will exchange it

Step-by-step example

8 0

3 years ago

Find the volume of this figure.

Mrac [35]

The answer is a because we don’t care

6 0

3 years ago

Fraction calculator 66 1/2 - 43=

zhuklara [117]

Answer:

$\frac{47}{2}$

Step-by-step explanation:

66 $\frac{1}{2}$ - 43 = 47/2

6 0

3 years ago

Read 2 more answers