Each December 31 in Country Q, a tally is made of the country's total available coal supplies—that is, the total amou...

Sean on September 9 at 05:14AM

PT 20, S1, Q24

I'm confused by this question/answer. Wouldn't we have to make the assumption that the same amount of coal was mined both years?

1 Reply

Stephanie on May 19 at 07:00PM

Please explain