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attashe74 [19]
3 years ago
15

I write out all the whole numbers, starting from 1. If I wrote 1994 digits altogether, what was the last complete number I wrote

down?
Mathematics
1 answer:
Nataly_w [17]3 years ago
3 0

Answer:

You wrote the numbers from 1 to 9: 9 digits.

You wrote the numbers from 10 to 99: 90*2 = 180 digits.

You have written 189 digits.

Then you wrote another 1994 - 189 = 1805

All the numbers from 100 to 999 have 3 digits

So you wrote 1805/3 = 601 2/3

This means 601 full numbers and 2 digits from the 602. number.

So 100 + 601 - 1 = 700 was the last number you wrote.

Do you agree?


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A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us
gregori [183]

Answer and Step-by-step explanation: The null and alternative hypothesis for this test are:

H_{0}: s_{1}^{2} = s_{2}^{2}

H_{a}: s_{1}^{2} > s_{2}^{2}

To test it, use F-test statistics and compare variances of each treatment.

Calculate F-value:

F=\frac{s^{2}_{1}}{s^{2}_{2}}

F=\frac{1.26^{2}}{0.93^{2}}

F=\frac{1.5876}{0.8649}

F = 1.8356

The <u>critical value of F</u> is given by a F-distribution table with:

degree of freedom (row): 20 - 1 = 19

degree of freedom (column): 20 - 1 = 19

And a significance level: α = 0.05

F_{critical} = 2.2341

Comparing both values of F:

1.856 < 2.2341

i.e. F-value calculated is less than F-value of the table.

Therefore, failed to reject H_{0}, meaning there is <u>no sufficient data to support the claim</u> that sham treatment have pain reductions which vary more than for those using magnets treatment.

4 0
3 years ago
Rita is making chili.The recipe calls for 2 3/4 cups of tomatoes. How many cups of tomatoes, written as a fraction greater than
Andrei [34K]
The way the this is worded means to turn it into a improper fraction which means the answer is  11/4

6 0
3 years ago
How many deaths per day if approximately 32200 citizens of a country died in automobile accidents in 2015.
Stolb23 [73]
32200 divide by the number of days in a year 365

32200 / 365 = 88.21

about 88 per day
4 0
3 years ago
Read 2 more answers
EASY QUESTION !! IF YOU GET IT RIGHT ILL AWARD BRAINLIEST!!
Romashka [77]

Answer: x=18, y=30

explanation: bc i’m right

7 0
3 years ago
a water tank holds 992 gallons but is leaking at a rate of 5 gallons per week . a second water tank holds 1,240 gallons but is l
enot [183]

Answer:

62 week

Step-by-step explanation:

What we need is to represent the ratios in expression

For example if we have 992 gallons and the leaking is 5 gallons per week, the expression for the gallons after every week is

992-5x

x is the weeks

And the other case the expressions is

1240-9x

The question is the weeks for the amount being the same, then every equation can be equal to Y and it represent the same amount

992-5x=y

1240-9x=y

in both the y is the same, then

992-5x=1240-9x

992-1240=-9x+5x

-248=-4x

-248/-4=x

62=X

and that is the weeks we need for the amount being the same in both tanks

8 0
3 years ago
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