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Galina-37 [17]
3 years ago
12

Help pleaseeeeeeeeee

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
5 0

9514 1404 393

Answer:

  47 -6√10

Step-by-step explanation:

As you know, the area of a square is the square of the side length. It can be helpful here to make use of the form for the square of a binomial.

  (a -b)² = a² - 2ab + b²

  (√2 -3√5)² = (√2)² - 2(√2)(3√5) + (3√5)²

  = 2 - 6√10 + 3²(5)

  = 47 -6√10

__

<em>Check</em>

  √2-3√5 ≈ -5.29399 . . . . . . . . note that a negative value for side length makes no sense, so this isn't about geometry, it's about binomials and radicals

  (√2-3√5)² ≈ 28.02633

  47 -6√10 ≈ 28.02633

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Answer:

165

Step-by-step explanation:

Here we have to use the ratio.

Both earth and Pluto are in similar shapes.

To find the number of sphere the size of Pluto does it take to have the same volume, we need to divide the earth's volume by Pluto's volume.

= Earth's volume/Pluto's volume

= 4/3 π (6371)^3 ÷ 4/3 π (1161)^3

Cancelling out 4/3 π both in the numerator and in the denominator, we get

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= 165.24

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Thank you.


8 0
4 years ago
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Step-by-step explanation:

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