In 2020, India was the world’s third largest economy, with a $9 trillion GDP (as measured in U.S. dollars). India was also one of the world’s fastest-growing economies, and over the previous decade, real GDP grew at an average rate of 5% per year.

a. If the country maintains the same growth rate, how many years will it take for India’s GDP to double?

b. Bangladesh’s GDP was $286.27 billion, but its growth rate was equal to India’s. How many years will it take for Bangladesh’s economy to double?

c. Although Bangladesh and India have the same annual growth rate, their economies are much different in size. How can you explain the size difference to someone who is unfamiliar with scaling large numbers? Which strategies would you use?