Because of the Increasingly Important Role Played by Coal as a Viable

Multiple Choice

Because of the increasingly important role played by coal as a viable alternative energy source, the production of coal has been growing at the rate of billion metric tons/year t years from 1990 (which corresponds to t = 0) . Had it not been for the energy crisis, the rate of production of coal since 1990 might have been only billion metric tons/year t years from 1990. Determine how much additional coal was produced between 1990 and the end of the century as an alternate energy source.

A) 13.6 billion metric tons
B) 0.6 billion metric tons
C) 4.7 billion metric tons
D) 7.9 billion metric tons