A particular country s exports of goods are increasing exponentially The value of the exports t years after 2007 can be approximated by V t 1 4e0 043t where t 0 corresponds to 2007 and V billions of dollars a Estimate the value of the country s exports in 2007 and 2020 b What is the doubling time for the value of the country s exports a The value of the country s exports in 2007 is billion Simplify your answer Round to the nearest tenth as needed Do not include the symbol in your answer The value of the country s exports in 2020 is billion Simplify your answer Round to the nearest tenth as needed Do not include the symbol in your answer b The doubling time is approximately years Simplify your answer Round to the nearest integer as needed