10) In 2010, the population of the country Erehwon was 50 million people and increasing by 2.9% every year. The population of the country Ecalpon, on the other hand, was 45 million people and increasing by 3.2% per year.

a) For each country, make a formula expressing the population as a function of time t, where t is the number of years since 2010. (2 pts.)

b) Find the value(s) of t, if any, when the 2 countries have the same population. (2 pts.)

c) When is the population of Ecalpon double that of Erewhon?