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ivann1987 [24]
3 years ago
7

9. The approximate circumferences of Earth

Mathematics
1 answer:
Molodets [167]3 years ago
8 0

Answer and explanation:

1) Given : Circumference of Earth C_E= 365,882\ km

Circumference of Saturn C_S= 4.01\times 10^4\ km

To find : How many times  greater is the circumference of Saturn than  the circumference of Earth?

Solution :

Let x be the number of times greater is the circumference of Saturn than  the circumference of Earth.

According to question,

x=\frac{C_E}{C_S}

x=\frac{365882}{4.01\times 10^4}

x=\frac{365882}{40100}

x=9.124

Therefore, 9.124 times  greater is the circumference of Saturn than  the circumference of Earth.

2) Number  0.037854921

Estimate to the nearest hundredth.

The hundredth number is 3 and thousandth number is 7.

As thousandth number 7 is greater than 5.

So, hundredth number is added by 1 and rest became zero.

i.e. 0.037854921\approx 0.04

3) Compare the numbers 6 \times 10{-6} and 2\times 10{-8}

6 \times 10{-6}=\frac{6}{1000000}

2\times 10{-8}=\frac{2}{100000000}=\frac{0.02}{1000000}

As the denominator is same compare the numerator,

0.02<6 or 6>0.02

So, 6 \times 10{-6}>2\times 10{-8}

Therefore, 6 \times 10{-6} is greater than 2\times 10{-8}

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Answer:

0.015 and 3/200.

Step-by-step explanation:

1.5% is equal to 0.015. Percents are always equal to their decimal counterparts; basically, the number over 100. Dividing 1.5 by 100 will yield us 0.015.

0.015 is going to be equal to 15/1000, or 3/200. Since we did 1.5/100, we need to multiply both sides of the fraction by 10 so there are no decimal points. Therefore, this is 15/1000. If we divide both sides of this fraction by 5, then we get 3/200, which is the most simplified form.

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Answer:

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Step-by-step explanation:

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Although five of John's answers were incorrect, 90% of his answers were correct. How many questions did John answer in all?
fiasKO [112]

Answer:

John answered 50 questions.

Step-by-step explanation:

Although five of John's answers were incorrect, 90% of his answers were correct.

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n = \frac{5}{0.1}

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John answered 50 questions.

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A company has budgeted 5 1/4 hours to complete a project, with 1/3 of the time spent on research. How much time does the company
elena-s [515]

Given that a company budgeted 5 1/4 hours to complete a project, determine how much time they spent on research if they spent 1/3 of the total budget.

First, convert the budget from hours into minutes.

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300 + 15 = 315

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