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scoundrel [369]
2 years ago
7

Must use scientific notation to answer this qestion thanks and fo you best​

Mathematics
1 answer:
Brums [2.3K]2 years ago
5 0

Answer:

3  × 10¹⁹ kg

Step-by-step explanation:

\text{Mass of water} = 5.9726 \times 10^{ 24}\text{ kg Earth } \times \dfrac{5 \times 10^{-4}\text{ kg water }}{\text{100 kg Earth}} = \mathbf{3 \times 10^{19}}\textbf{ kg water}

The answer can have only one significant figure, because you estimated the percent of water to only one significant figure.

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The perimeters of the square and the regular pentagon are equal.
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The length of a rectangle in centimeters is two more than thrice its width. a) Write an expression, in the simplest form, for th
Karo-lina-s [1.5K]

Answer:

Perimeter of the rectangle = 8 x +4

Length of the rectangle = 12 units.

Step-by-step explanation:

Let the width of the rectangle as 'x' units.

So, length of the rectangle is 2 more than 3 x.

We can set up expression for length as 3 x+2.

Now, perimeter is sum of all side lengths of the rectangle.

So, perimeter = x+x+3 x+2 +3 x+2

Combine like terms,

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Now, it is given perimeter is 36cm

So,

8 x+4=36

Subtract both sides 4

8 x=32

Divide both sides by 8

x=4

So, width of the rectangle =4

Length =3(4) +2=14

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3 years ago
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Answer:

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Step-by-step explanation:

-2.5 times 4

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It takes one week for a crew of workers to pave 3/5 kilometer of a road. At that rate, how long will it take to pave 1 kilometer
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1.67 weeks

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