Suppose that the world's current oil reserves is R
=
1840
billion barrels. If, on average, the total reserves is decreasing by
24
billion barrels of oil each year, answer the following

Give a linear equation for the total remaining oil reserves,
R
, in terms of
t
,
the number of years since now.

Astudent found the solution below for the given inequality. |x-9|< -4 x-9> 4 and x-9< -4 x> 13 and x< 5 which of the following explains whether the student is correct? -the student is completely correct because the student correctly wrote and solved the compound inequality. -the student is partially correct because only one part of the compound inequality is written correctly. -the student is partially correct because the student should have written the statements using “or” instead of “and.” -the student is completely incorrect because there is no solution to this inequality.