Question

Дам 100 баллов!!!!В России живет много медведей. Каждый год 18 апреля проводят перепись медведей. В 2011 году количество медведей увеличилось по сравнению с 2010 годом ровно на 5%. В 2012-2015 годах прирост медведей каждый год составлял ровно 5%, причем, по данным переписи 2015 года, в России проживало более 10000000 медведей, но менее 15000000 медведей. Сколько медведей жило в России 18 апреля 2015 года?

Answer 1

Пусть 15 февраля 2009 г. в России было х медведей, тогда в 2010 г. их было х = х, в 2011г. – ()2 х = х, в 2012г. - в 2013г. - х, а в 2014г. - х. Отсюда следует, что х делится на 3200000. Поскольку 5000000 < х < 10000000, то х = 6400000, и на 15 февраля 2014 г. было 8168202 медведя. 

Answer 2

Number of Bears in Russia on April 18, 2015

According to the information provided, the number of bears in Russia on April 18, 2015, can be determined by considering the growth rate of bears from 2011 to 2015.

It is stated that in 2011, the number of bears increased by exactly 5% compared to 2010. From 2012 to 2015, the growth rate of bears remained constant at 5%. Additionally, according to the census data from 2015, there were more than 10,000,000 bears in Russia, but less than 15,000,000 bears.

To calculate the number of bears in Russia on April 18, 2015, we can start with the number of bears in 2011 and apply the growth rate for each subsequent year.

Let's assume the number of bears in Russia in 2010 was X.

- In 2011, the number of bears increased by 5%, resulting in X + 0.05X = 1.05X bears. - From 2012 to 2015, the growth rate remained constant at 5%. Therefore, the number of bears in each subsequent year can be calculated as follows: - In 2012: 1.05(1.05X) = 1.1025X bears. - In 2013: 1.05(1.1025X) = 1.157625X bears. - In 2014: 1.05(1.157625X) = 1.21550625X bears. - In 2015: 1.05(1.21550625X) = 1.2762815625X bears.

Based on the census data from 2015, we know that there were more than 10,000,000 bears but less than 15,000,000 bears in Russia. Therefore, we can set up the following inequality:

10,000,000 < 1.2762815625X < 15,000,000

To find the number of bears, we can solve this inequality for X:

10,000,000 / 1.2762815625 < X < 15,000,000 / 1.2762815625

Calculating the values:

7,828,427.12 < X < 11,737,041.64

Therefore, the number of bears in Russia on April 18, 2015, falls between approximately 7,828,427 and 11,737,042 bears.

Please note that the actual number of bears on that specific date may vary, and the provided calculation is based on the given information and assumptions.