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yulyashka [42]
3 years ago
6

What is the value of x when the Richter scale rating is 7.8? Round your answer to the nearest hundredth.

Mathematics
1 answer:
Tcecarenko [31]3 years ago
7 0

Hello,

We have to use this relation : \text{rating}=\log(\text{ratio})

He we have :

\log_{10}(x)=7.8\\\\\text{then }x=10^{\log_{10}(x)}\\\\\rightarrow x=10^{7.8}\\\\\rightarrow x=6.309\times 10^{7}\\\rightarrow x=6.31\times 10^{7}


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lidiya [134]
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Distance traveled by hour hand = 2(2πr) = 4πr₁

In 60 s, the long hand, which denotes numbers of minutes, makes one revolution around the clock. Since there are 86,400 seconds in a day, that would be a total of 1,440 revolutions.

Distance traveled by minute hand = 1,440(2πr) = 2,880πr₂

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7 0
3 years ago
Find the length of line segmentAB which joins the following points.A(10, 14) and B(2,6)​
Helen [10]

Answer:

The equation of the line AB is  y - x -4 = 0

Step-by-step explanation:

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or, m = \frac{14 -6 }{10 - 2} = \frac{8}{8}  = 1

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The equation of line is given as :    y - y0 = m (x-x0)

So,the equation of line AB is  y - 6 = 1(x-2)

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Hence, the equation of the line AB is  y - x -4 = 0

5 0
3 years ago
Graham paid $87.45 for a pair of jeans. This amount included a tax of 40%. What was the cost of the jeans before tax?
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The final price is the cost plus the tax.

Since we know the tax and a percent, we can write this as

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Plugging in what we know

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87.45 = C(1.4)

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Answer:

36

Step-by-step explanation:

6•6=36

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