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bulgar [2K]
3 years ago
11

So when you add 3+4 you get 7, but what if you divide 7 by 4? Do you still get 3?

Mathematics
2 answers:
krek1111 [17]3 years ago
7 0
No you wouldn’t it would be a different answer
scoray [572]3 years ago
3 0

Answer:

True. 3 + 4 is 7.

However if you divide 7 by 4, it is not 3.

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What is the value of x when the richter scale rating scale is 8.4?
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The value of x when the richter scale rating scale is 8.4 is 251188643.151

<h3>What is a richter scale?</h3>

A richter scale is a numerical scale that is used for expressing the magnitude of an earthquake in a geographical area

<h3>How the richter scale works?</h3>

The richter scale takes the amplitude of the earthquake's largest seismic as an input and calculate (and display) the magnitude of an earthquake in the geographical area using a logarithmic function

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In this case, n = 8.4.

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x = 10^8.4

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Hence, the value of x when the richter scale rating scale is 8.4 is 251188643.151

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At the U.S open tennis championship a statistician keeps track of every serve that a player hits during the tournament. The mean
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Step-by-step explanation:

Both 115 and 145 mph are above the mean.  Draw a normal curve and mark these speeds.  115 mph is 1 standard deviation above the mean; 130 would be 2 standard deviations above the mean; and 145 would be 3 s. d. above it.

We need to find the area under the standard normal curve between 115 and 145.  This is equivalent to the area under the standard normal curve between z = 1 and z = 3.

I used my TI-83 Plus calculator's DISTR function "normalcdf(" to calculate this area:  normalcdf(1, 3) = 0.1573.

The area between z = 1 and z = 3 is 0.1573.  In other words, the percentage of serves that were between 115 and 145 mph was 15.73%.

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