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Rzqust [24]
4 years ago
13

I need help please ASAP im gonna fail if i dont get right will give 51 points

Mathematics
1 answer:
evablogger [386]4 years ago
3 0

1. x = 20 , x² = 400 and x³ = 8000

2. x = 7 , x² = 49 and x³ = 343

Step-by-step explanation:

Given values are;

2000, 7, 400, 20, 4000, 200

We have to find x, x² and x³.

Part 1:

x^3=8000

We will take cube root to find x.

\sqrt[3]{x^3} =\sqrt[3]{8000}

x=20

Now, we will take square;

(x)^2=(20)^2\\x^2=400

Therefore;

x = 20 , x² = 400 and x³ = 8000

Part 2:

x² = 49 , x³ = 343

Taking square root on x²

\sqrt{x^2}=\sqrt{49}\\x=7

Therefore;

x = 7 , x² = 49 and x³ = 343

Keywords: cube root, square root

Learn more about cube root at:

  • brainly.com/question/9607945
  • brainly.com/question/9590016

#LearnwithBrainly

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From the question we are told the confidence level is  90% , hence the level of significance is    

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From the question we are told the confidence level is  99% , hence the level of significance is    

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=>      n = [\frac{2.58}{0.03} ]^2 * 0.59 (1 - 0.59 )

=>      n = 1789

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