Oil is pumped continuously from a well at a rate proportional to the amount of oil left in the well. initially there were 5 million barrels of oil in the well; six years later 2,500,000 barrels remain.
(a) at what rate was the amount of oil in the well decreasing when there were 3,000,000 barrels remaining?
rate = (? ) barrels/year

Jessica and martha each have a bag of cookies with unequal quantities. they have 30 cookies total between the two of them. each of them ate 6 cookies from their bag. the product of the number of cookies left in each bag is not more than 80. how many more cookies will jessica have martha? if x represents the number of cookies jessica started with, complete the statements below. the inequality that describes the relationship between the number of cookies each one of them has is x^2 - x +224 > = 0.jessica has at least cookies more than martha.

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.