In 1998, the population of country C was 38 million, and the exponential growth rate was 1% per year

Step-by-step explanation:

Formula for the exponential graph is given by the function,

Where = population after 't' years

= Initial population

r = rate of increase

t = Number of years

In 1988, population of a country C was 30 million.

A). Function for the population will be,

B). Population in year 2020,

           = 47.30 million

C). Doubling time means the duration in which becomes .

  By taking log on both the sides of the equation,

  t[log(1.01)] = log2

  t =

    =

  t = 69.66 years

5

step-by-step explanation: