Total emissions of carbon dioxide from the burning of fossil fuels have been increasing at about 5% per year (data from 2010 to 2011). If emissions continue to increase at this rate, about how much higher will total emissions be in 2025 than in 2010?
Using the approximate formula, emissions will increase by a factor of ..... between 2010 and 2025.
Using the exact formula, emissions will increase by a factor of ..... between 2010 and 2025.
