Since 1905 the amount of carbon dioxide has been increasing. Total production of CO2 from all counntries except US, Canada, and western Europe can be approximated by:
CO2=.073x^2-.39+.55
Where x represents each 10 year period since 1905 substitute 1 for x to calculate production in 1915. 2 for x to calculate 1925, 3 for 1935.
Assume trend continues what is approximate by 2005?