Question

the population of the world in 1987 was 5 billion and the annual growth rate was estimated at 2% per year. Assuming that the world population follows an exponential growth model. whats the projected world population in 1991

Answer 1

Using an exponential growth model with a 2% growth rate per year, the projected world population in 1991 would be approximately 5.41 billion.

Step-by-step explanation:

To project the world population in 1991 using an exponential growth model with an initial population of 5 billion in 1987 and a growth rate of 2% per year, we can use the formula:

P = P0 × (1 + r)t

where:

• P is the future population
• P0 is the initial population
• r is the annual growth rate (expressed as a decimal)
• t is the number of years between the initial and future time

Plugging in the values, we get:

P = 5 billion × (1 + 0.02)4

Solving for P, we find:

P = 5 × 1.024

P ≈ 5.41 billion

Therefore, the projected world population in 1991 would be approximately 5.41 billion people.

Answer 2

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