what is the answers and the equation you used to get the answer?

Question

a country currently has apopulation of 100 million and an animal growt rate of 3.5 percent. if the growth rate remains constant, what will be the populaion of this country in 40 years?

Answer 1

Let P=population
g=growth rate
t=number of years

The formula would be:

P(1+g)^t

where "^t" means "raised to the t power"

100,000,000(1+0.035)^40 = 395,925,972.12 (rounded to the hundreth)

But of course, you cannot consider a 12/100 being to be a person, so the better answer would be 395,925,972.

Answer 2

First of all, I think you mean ANNUAL growth rate instead of animal (unless you are counting the dogs,cats, etc., too)--which means yearly.
You take the figure 100,000,000 (the one hundred million), and ADD 3.5% which totals 103,500,000 (or 3 1/2 million more people the first year). You can then take this figure and add 3.5% to each year's total. After I got the first year's total, using a calculator, I just hit the EQUALS key another 39 times (which adds it automatically for you) and came up with a final total population of 240 million people.

100,000,000 + 3.5%=103,500,000 (first year), keep adding 3.5% to each year's total