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Yuliya22 [10]
3 years ago
13

I have 6 thousands 12 tens 9 hundreds 10 ones and 3 tenths what number am i

Mathematics
1 answer:
mixer [17]3 years ago
4 0

Here let us first write the value of each number:

6 thousands means 6*1000=6000.

9 hundreds means 9*100=900.

12 tens means 12*10 =120

10 ones means 10*1 =10

3 tenths means 3/10 =0.3

Now we just have to add all these values to get the final number.

adding 6000 + 900 +120 +10 +0.3 = 7030.3

So the final number is 7030.3

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Jenna has bought a new hybrid car. Each week for a period of seven weeks, she has noted the fuel efficiency (in miles per gallon
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Answer: 0.82 miles per gallon

Step-by-step explanation:

Given : Jenna has bought a new hybrid car. Each week for a period of seven weeks, she has noted the fuel efficiency (x) (in miles per gallon) of her car.

The results are :45 44 43 44 45 44 43

The formula to find the standard deviation is given by :-

\sigma=\sqrt{\dfrac{\sum_{i=1}^n(x_i-\overline{x})^2}{n-1}}

First we find mean of the given data ,

\overline{x}=\dfrac{\sum^n_{i=1}x_i}{n}\\\\=\dfrac{45+44+43+44+45+44+43}{7}=\dfrac{308}{7}=44

Now,

{\sum_{i=1}^n(x_i-\overline{x})^2=(1)^2+(0)^2+(-1)^2+(0)^2+(1)^2+(0)^2+(-1)^2

=1+1+1+1=4

Now,  standard deviation of the above results will be :-

\sigma=\sqrt{\dfrac{4}{7-1}}\\\\=\sqrt{\dfrac{4}{6}}\\\\=\dfrac{2}{\sqrt{3}}=0.816496580928\approx0.82

Hence, the standard deviation of these results = 0.82 miles per gallon

8 0
3 years ago
I need help with this question
Mumz [18]

Answer:

im pretty sure the answer is 60

Step-by-step explanation:

6 ten thousands is 60,000

60,000 divided by 1000 is 60

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Answer:

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Step-by-step explanation:

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2x = 388

x = 194

194* 2 + 1 = 389

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