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

Question

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

Quizplus · Accepted Answer

To solve the problem, we need to find the difference between the production of coal with the energy crisis and without it for the years 1990 to 2000.

Let's start with the production of coal with the energy crisis.

Production of coal with the energy crisis = 11eb12b0_a970_864e_b394_197c77e05d41_TB7866_11 billion metric tons/year × t years
= 11eb12b0_a970_864e_b394_197c77e05d41_TB7866_11 t billion metric tons

And the production of coal without the energy crisis is:

Production of coal without the energy crisis = 11eb12b0_a970_864f_b394_79b419830e1b_TB7866_11 billion metric tons/year × t years
= 11eb12b0_a970_864f_b394_79b419830e1b_TB7866_11 t billion metric tons

So the additional coal produced between 1990 and the end of the century is:

Additional coal = Production of coal with the energy crisis - Production of coal without the energy crisis
= (11eb12b0_a970_864e_b394_197c77e05d41_TB7866_11 - 11eb12b0_a970_864f_b394_79b419830e1b_TB7866_11) × 10 billion metric tons
= 7.9 billion metric tons

Therefore, the answer is D) 7.9 billion metric tons.

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