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3 years ago

Which is the same as moving the decimal point 3 places to the left in a decimal number

Mathematics

2 answers:

iragen [17]3 years ago

8 0

<h3>Answer:</h3>

B: Dividing the number by 1000

<h3>Step-by-step explanation:</h3>

Suppose we start with the number

1000.

Moving the decimal point 3 places to the left gives ...

1.000

This number is a factor of 1000 smaller than the original—what you'd expect to get when you divided by 1000.

Gekata [30.6K]3 years ago

4 0

The answer would be B: Dividing the number by 1000

Every time you move the decimal, add a zero. Since the decimal is moved three times, there are three zeroes. When you move left, the number is getting smaller so it is division.

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find the slope between each pair of points please help with these three questions and i’ll mark the brain thing !

madam [21]

(If It's a number like this: 8/9 then it's a fraction)

Answer:

Step-by-step explanation:

Yay, I love doing these!

9.} 6 - 8 and 4- -2= -2/6

10.} 3 - 9 and -1 - 9= -6/-10

11.} -1 - -7 and 5 - -3= 6/8 simplify it by 2= 3/4

5 0

3 years ago

The distribution of resistance for resistors of a certain type is known to be normal, with 10% of all resistors having a resista

baherus [9]

Answer:

The mean is 9.65 ohms and the standard deviation is 0.2742 ohms.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

10% of all resistors having a resistance exceeding 10.634 ohms

This means that when X = 10.634, Z has a pvalue of 1-0.1 = 0.9. So when X = 10.634, Z = 1.28.

$Z = \frac{X - \mu}{\sigma}$

$1.28 = \frac{10.634 - \mu}{\sigma}$

$10.634 - \mu = 1.28\sigma$

$\mu = 10.634 - 1.28\sigma$

5% having a resistance smaller than 9.7565 ohms.

This means that when X = 9.7565, Z has a pvalue of 0.05. So when X = 9.7565, Z = -1.96.

$Z = \frac{X - \mu}{\sigma}$

$-1.96 = \frac{9.7565 - \mu}{\sigma}$

$9.7565 - \mu = -1.96\sigma$

$\mu = 9.7565 + 1.96\sigma$

We also have that:

$\mu = 10.634 - 1.28\sigma$

$10.634 - 1.28\sigma = 9.7565 + 1.96\sigma$

$1.96\sigma + 1.28\sigma = 10.645 - 9.7565$

$3.24\sigma = 0.8885$

$\sigma = \frac{0.8885}{3.24}$

$\sigma = 0.2742$

The mean is

$\mu = 10.634 - 1.28\sigma = 10 - 1.28*0.2742 = 9.65$

The mean is 9.65 ohms and the standard deviation is 0.2742 ohms.

8 0

4 years ago

Jordan buys a car for £5000. It depreciates buy 23% per year. How much is it worth after 5 years?

Basile [38]

The answer can be computed as follows:
worth = £5000(1 - 0.23)^(5) = <span>£1353.39
It is approximately worth </span><span>£1353.39 after 5 years.</span>

3 0

3 years ago

-2(6) + 3(5 – 4· 2)

rjkz [21]

Answer:

-21

Step-by-step explanation:

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3 years ago

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