Thursday

October 23, 2014

October 23, 2014

Posted by **Anonymous** on Wednesday, April 13, 2011 at 9:47am.

(a) If the world population continues to grow at approximately 2%/year, find the length of time t0 required for the population to double in size.

t0 = yr

(b) Using the time t0 found in part (a), what would be the world population if the growth rate were reduced to 1.6%/yr?

billion people

- Math -
**Henry**, Friday, April 15, 2011 at 11:05pmQ(t) = 5.3 + 0.02*5.3t,

Q(t) = 5.3 + 0.106t.

a. Q(t) = 5.3 + 0.106t = 10.6 Billion,

5.3 + 0.106t = 10.6,

0.106t = 10.6 - 5.3 = 5.3,

t = 50 years.

b. Q(t) = 5.3 + 0.016t*5.3,

Q(t) = 5.3 + 0.0848t.

Q(t) = 5.3 + 0.0848*50 = 9.54 Billion.

- Math -
**Ruvinka**, Tuesday, December 11, 2012 at 6:34pmpart a is incorrect, the proper answer is:

Q(t)=Qoe^kt

Q(t)= 5.3e^0.02t

2=e^0.02t

ln2=0.02t

t=34.6yr

**Answer this Question**

**Related Questions**

Applied Calculus - The world population at the beginning of 1990 was 5.3 billion...

Algebra - Wk 6 Sec 12.7 #24 World population growth In 2008 the world population...

calculus - The population of less-developed countries in mid-2007 of 4086 ...

Math - The population of the Earth is approximately 6 billion people and is ...

maths - The population of the world in 1987 was 5 billion and the annual growth ...

math - In 1980, the population of a certain country was about 161 000. since ...

College Algebra - The population of the Earth is approximately 6 billion people...

algebra - In 1990, the population of Africa was 643 million and by 2000 it had ...

Calculus - for population in billions, where t is years since 1990: N(t) = 41/1+...

math 12 - The world's population is 1970 was about 3.6 billion. If the ...