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tiny-mole [99]
3 years ago
11

The diameter of Mercury is approximately 4.9×103 kilometers. The diameter of Saturn is approximately 1.2×105 kilometers. About h

ow many times greater is the diameter of Saturn than the diameter of Mercury? A 2.4 B 24 C 240 D 2400
Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
8 0

As soon as you see "How many times . . .", that usually tells you that finding the answer involves <em>division</em>.  (It certainly does in this one.)

(1.2 x 10⁵) / (4.9 x 10³)  =  

(1.2/4.9) x (10⁵⁻³)  =

0.245 x 10²  =  <em>24.5 times</em>

It looks like  <em>B</em>  is the closest choice.

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\textit{surface area of a sphere}\\\\ SA=4\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=2 \end{cases}\implies \begin{array}{llll} SA=4\pi (2)^2\implies SA=16\pi \\\\\\ SA\approx 50.27 \end{array}

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2 years ago
5,3,-7,-8,-2 order from greatest to least
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Answer

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Explanation

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Negative numbers go up as they decrease.

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Which equation can be used to represent "six added to twice the sum of a number and four is equal to half the difference of thre
forsale [732]
2(n+4) + 6 = (1/2)(3-n)

Then 2n + 8 + 6 = 3/2 - n/2
and    2n + 14 = 3/2 - n/2

(5/2)n = 3/2 - 28/2 = -25/2
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n = -------------- = -5 (answer)
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6 0
3 years ago
Jake said he can find 630 ÷ 10 by taking the 0 off of 630 to get 63.
Colt1911 [192]

Answer:

Jake is incorrect with his methodology for solving these problems

Step-by-step explanation:

Jake is incorrect with his methodology for solving these problems. This is because dividing a number by 10 requires moving the decimal point one digit to the left. When dividing 630 by 10, removing the zero works because by moving the decimal one digit to the left we would simply drop the zero and the decimal would not be needed leaving the answer as 63. However, this does not work on numbers that already have a decimal such as 35.270. This number divided by 10 would be 3.527 but simply removing the 0 like Jake states would give us the incorrect answer of 35.27

4 0
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