Posted by steve alexander on Tuesday, November 25, 2008 at 7:45pm.
1. .015*65*12+65=76.7 million
2. 4*65=260 million
1. Multiply 65 million by (1.015)^12
(1.015^12 = 1.1956)
2. Multiply 65 million by 4.
You don't need to use log for the second one.
You can to 1. with a log table or with a hand calculator (as I did).
If you use logs:
Log (answer) = log (65 million) + 12 log 1.015
Then take the antilog
You will learn more if you do the calculations yourself than if I gave you the numerical answers.
Let
P = population in millions
t = time in years
Population growth is continuous. For continuous compounding use the formula:
P = 65*e^(.015t)
For the population in 12 years we have:
P = 65*e^(.015*12) = 65*e^(.18)
P = 77.8 million
Related Questions
Math - In 1987, the population of Mexico was estimated at 82 million people, ...
calculus - The population of a country was 8.4 million people in 2000. Three ...
math - The population P in 1995 for a state is given along with r, its annual ...
algebra - neil was growin a culture of a bacteria for biology experiement. he ...
algebra - neil was growing a culture of bacteria for a biology experiment. he ...
algebra - Pick a country of your choice that is experiencing population growth. ...
algebra, math133 - Pick a country of your choice that is experiencing population...
math - In 2000 the population of a state was 5 million and growing continuously ...
diffeq - Let P(t) represent the population of a non-native species introduced to...
Algerba - Pick a country of your choice that is experiencing population growth...
For Further Reading
