Ask question

Ask question

All categories

2 years ago

12

Please help me with this question!!!

1 answer:

Evgesh-ka [11]2 years ago

3 0

Answer:

Step-by-step explanation:

z1=6(cos\frac{3\pi}{2}+isin \frac{3\pi}{2})=6e^{i\frac{3 \pi}{2}} \\similarly~ z2=12e^{i\frac{5 \pi}{6}} \\z1z2=72e^{i(\frac{3 \pi}{2}+\frac{5 \pi}{6}} )\\=72e^{i(\frac{9 \pi+5 \pi}{6}} )\\=72e^{i \frac{7 \pi}{3}} \\=72(cos \frac{7 \pi}{3}+i sin \frac{7 \pi}{3})

You might be interested in

How many 30 degree angles does it take to make 180

aniked [119]

6 i belive let me double check

8 0

2 years ago

Read 2 more answers

An important factor in selling a residential property is the number of times real estate, agents show a home. A sample of 21 hom

Natalka [10]

Using the t-distribution to build the 99% confidence interval, it is found that:

The margin of error is of 3.64.

The 99% confidence interval for the population mean is (19.36, 26.64).

<h3>What is a t-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm t\frac{s}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

t is the critical value.

n is the sample size.

s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed 95% confidence interval, with 21 - 1 = 20 df, is t = 2.086.

The other parameters are given as follows:

$\overline{x} = 23, s = 8, n = 21$

The margin of error is given by:

$M = t\frac{s}{\sqrt{n}} = 2.086\frac{8}{\sqrt{21}} = 3.64$

Hence the bounds of the interval are:

$\overline{x} - M = 23 - 3.64 = 19.36$

$\overline{x} + M = 23 + 3.64 = 26.64$

The 99% confidence interval for the population mean is (19.36, 26.64).

More can be learned about the t-distribution at brainly.com/question/16162795

#SPJ1

7 0

1 year ago

Grade 7th math anybody know the answer

TiliK225 [7]

Our answer is attached.

I hope it helped.

=)

4 0

2 years ago

Please assist me in my time of need.

vaieri [72.5K]

Answer:

I shall assist thee.

Step-by-step explanation:

Being me, I would say the answer is A. or B. But i'd prolly go with A tbh.

And oofers on me if this ain't what you need.

4 0

3 years ago

If 30.s g of milk contains 18 C, how many

liubo4ka [24]

Answer:

the answer would be (244/30.5) x 18, so the answer should be 144!

Step-by-step explanation:

Put me the brainest. thanks

8 0

2 years ago

Read 2 more answers