Home
Class 12
BIOLOGY
In 2005, for each of the 14 million peop...

In 2005, for each of the 14 million people present in a country, `0.028` were born and `0.008` died during the year. Using exponential equation, the number of people present in 2015 is predicted as

A

25 millions

B

17 millions

C

20 millions

D

18 millions

Text Solution

Verified by Experts

The correct Answer is:
B
`(dN)/(dt)=rN`
r=0.028-0.008=0.02
dt=2015-2005=10 years
`N=N_("2005")`=14 million
dN=Change in population in 10 years
`(dN)/(dt)=0.02xx14`
`=0.02xx14xx10`
dN=2.8 million
dN=`N_(2015)-N_(2005)`
`N_(2015)=dN+N_(2005)`
`2.8+14=16.8`=17 million
Promotional Banner

Similar Questions

Explore conceptually related problems

The population of a certain is known to increase at a rate proportional to the number of people presently living in the country. If after two years the population has doubled, and after three years the population is 20,000 estimates the number of people initially living in the country.

The given Bar Graph presents a country's exports (in million rupees) during 2015-2018, and the Table the follows shows the break-up of goods exported in a year. Break-Up of Goods Exported in a Year What is the ratio of the total exports of computers in 2015 and 2017 to the total exports of cosmetics in 2015 and 2018 ?

Dr. John is a botanist , he is experimenting with exotic species of rose plant Rose polyantha . He started with 40 plants, after a year 22 more plants were added thought reproduction but also 14 plants died during the experimentation . Which of the following statements are correct ? 1. The death rate is 0.35% per year 2. The birth rate is 0.55 % per rose per year 3. The birth rate is 0.55 % per year 4. The death rate is 0.35 % per rose per year

The given Bar Graph presents a country's exports (in million rupees) during 2015-2018, and the Table that follows shows the break-up of goods eported in a year. Break-Up of Goods Exported in a Year Total exports of Jewellery in 2015, 1016 and 2018 is what percent of the total exports of textiles in 2017 and 2018 ?