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olasank [31]
3 years ago
5

How many 9 are present from 1 to 10000​

Mathematics
2 answers:
astraxan [27]3 years ago
5 0

Answer:

300

Step-by-step explanation:

Papessa [141]3 years ago
4 0

Answer:

The digits 9 occurs in the thousands place in 1000 numbers. The digit occurs 4000 times.

Step-by-step explanation:

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A local agricultural cooperative claims that 55% of about 60,000 adults in a country believe that gardening should be part of th
insens350 [35]

Using the <u>normal distribution and the central limit theorem</u>, it is found that there is a 0.0409 = 4.09% probability that, from a simple random sample of 300 adults in the county, less than 50% would say they believe that gardening should be part of the school curriculum.

In a normal distribution with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

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

  • It 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, which is the percentile of X.
  • By the Central Limit Theorem, the sampling distribution of sample proportions for a proportion p in a sample of size n has \mu = p, s = \sqrt{\frac{p(1 - p)}{n}}

In this problem:

  • The proportion is of 55%, hence p = 0.55
  • The sample has 300 adults, hence n = 300

Then, the <u>mean and the standard error</u> are given by:

\mu = p = 0.55

s = \sqrt{\frac{p(1 - p)}{n}} = \sqrt{\frac{0.55(0.45)}{300}} = 0.0287

The probability is the <u>p-value of Z when X = 0.5,</u> hence:

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

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{0.5 - 0.55}{0.0287}

Z = -1.74

Z = -1.74 has a p-value of 0.0409.

0.0409 = 4.09% probability that, from a simple random sample of 300 adults in the county, less than 50% would say they believe that gardening should be part of the school curriculum.

A similar problem is given at brainly.com/question/25800303

8 0
3 years ago
You entered a contest through your local television station. There is one first prize of a new car! There are 5 second place pri
Grace [21]

Answer:

\frac{1}{400} or 0.0025 0r 0.25%

Step-by-step explanation:

There are three categories that will get a prize

1) First place = 1 person

2) Second place = 5 persons

3) Third place = 20 persons

A total of 26 people will get prizes.

However, we want to determine your chance to win one of the second place prizes

There are 5 prizes in second place

This means out of a total of 2000 people, you could be among the 5

i.e 5 out of 2000

This is \frac{5}{2000} = \frac{1}{400} = 0.0025

This means you have a chance of 1 out of 400

= 0.25%

8 0
4 years ago
Read 2 more answers
The answer for -9/4+2/7
Alex777 [14]
-9/14+2/7=13/14
it is corrected
6 0
4 years ago
Fill in the blank in the sentence below with the correct term.
VARVARA [1.3K]

Answer:

The percent equation states that the part equals the percent multiplied by the whole number.

3 0
3 years ago
Jed took 2 free throws in 5 seconds Alex took four free throws in 12 seconds. did the two shoot free throws at the same rate?
____ [38]
Jed: 2 free throws/ 5 sec= 0.4 free throw/sec.

Alex: 4 free throws/12 sec= 0.33333... free throw/sec.

The two did not shoot free throws at the same rate~
8 0
3 years ago
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