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2 years ago

Which is equivalent to 3√8* ? O x √8^3 O 8 ^3/x O 8 ^x/3 O 8^3x

Mathematics

1 answer:

Leni [432]2 years ago

6 0

Answer:

O 8 ^x/3

Step-by-step explanation:

Remember that :

$\sqrt[n]{x} = x^\frac{1}{n}$

………………………………

Then

$\sqrt[n]{8^x} = (8^{x})^{\frac{1}{3}}$

$= 8^{x\times\frac{1}{3}$

$=8^{\frac{x}{3}$

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Two planes are the same altitude. From the airport , one plane is 50 km away in the direction of N°60 E and another is 80 km awa

djverab [1.8K]

9514 1404 393

Answer:

78.5 km

Step-by-step explanation:

Measured at the airport, the angle between the two planes is ...

180° -60° -50° = 70°

The law of cosines tells us the distance between the planes is ...

d = √(50² +80² -2·50·80·cos(70°)) ≈ √6163.84 ≈ 78.5 . . . km

The planes are about 78.5 km apart.

6 0

2 years ago

A survey found that 89% of a random sample of 1024 American adults approved of cloning endangered animals. Find the margin of er

Kobotan [32]

Answer:

The margin of error for the survey is 0.016

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 1024

Sample proportion:

$\hat{p} = 89\% = 0.89$

We have to find the margin of error associated with a 90% Confidence interval.

Formula for margin of error:

$z_{stat}\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.10} = 1.64$

Putting the values, we get:

$M.E = 1.64\times (\sqrt{\dfrac{0.89(1-0.89)}{1024}})\\\\M.E=0.016$

Thus, the margin of error for the survey is 0.016

3 0

3 years ago

Can someone help me and tell me how I got it wrong?

kramer

Answer:

You put i at the end.

Step-by-step explanation:

The correct answer is u^5 remove the i.

3 0

3 years ago

Read 2 more answers

PLEASE HELP!! Factor 6x^2-42x-54 Please show work!

skad [1K]

first, rewrite 54 as 6•9

next, rewrite 42 as 6•7

then, that gets you 6x^2 -6•7x- 6•9

lastly, factor out the common term (6)

and then you get 6(x^2-7x-9)

please mark as brainliet <3

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3 years ago

1220000 scientific notation

Nutka1998 [239]

Answer:

1.22 x $10^{6}$

Step-by-step explanation:

1,220,000 would be...

1.22 x 10^6

4 0

3 years ago

Read 2 more answers