Exponential Growth problem.

Population 6,000 billion

Rate 1.3% per year

Estimate population in the year 2100

It will be understood that population 6,000 billion (6*10^12) in 2017.

If this is not the case, follow the logic and the final number can be adjusted easily.

Mathematical answer:

In 2017: 6,000 billion=6000*10^9 = 6*10^12

rate of increase = 1.3% per year (assumed constant)

final year = 2100

Population estimate in 2100

=6*10^12 * (1.013^ (2100-2017))

=6*10^12 * (1.013^ (83)

=6*10^12 * (2.921352509198383)

=17.528*10^12

=17,528 billion.