25. In Problem 10, if in the same amount of time that it takes her to read 40 pages of economics and 30
pages of sociology, Martha could read 20 pages of economics and 110 pages of sociology, then which
of these equations describes combinations of pages of economics, E, and sociology, S, that she could
read in the time it takes to read 40 pages of economics and 30 pages of sociology?
26. In Problem 11, ads in the boring business magazine are read by 300 lawyers and 1,000 M.B.A.s. Ads
in the consumer publication are read by 250 lawyers and 300 M.B.A.s. If Harry had $3,000 to spend
on advertising, if the price of ads in the boring business magazine were $600, and if the price of ads in
the consumer magazine were $300, then the combinations of recent M.B.A.s and lawyers with hot tubs
whom he could reach with his advertising budget would be represented by the integer values along a
line segment that runs between the two points
(2, 500, 3, 000) and (1, 500, 5, 000).
(3, 000, 3, 500) and (1, 500, 6, 000).
(0, 3, 000) and (1, 500, 0).
(3, 000, 0) and (0, 6, 000).
(2, 000, 0) and (0, 5, 000).
27. In Problem 11, ads in the boring business magazine are read by 300 lawyers and 1,000 M.B.A.s. Ads
in the consumer publication are read by 250 lawyers and 300 M.B.A.s. If Harry had $3,250 to spend
on advertising, if the price of ads in the boring business magazine were $500, and if the price of ads in
the consumer magazine were $250, then the combinations of recent M.B.A.s and lawyers with hot tubs
whom he could reach with his advertising budget would be represented by the integer values along a
line segment that runs between the two points
(3, 900, 0) and (0, 7, 800).
(3, 250, 3, 900) and (1, 950, 6, 500).
(0, 3, 900) and (1, 950, 0).
(3, 900, 4, 550) and (1, 950, 7, 800).
(2, 600, 0) and (0, 6, 500).
28. In Problem 11, ads in the boring business magazine are read by 300 lawyers and 1,000 M.B.A.s. Ads
in the consumer publication are read by 250 lawyers and 300 M.B.A.s. If Harry had $2,250 to spend
on advertising, if the price of ads in the boring business magazine were $300, and if the price of ads in
the consumer magazine were $150, then the combinations of recent M.B.A.s and lawyers with hot tubs
whom he could reach with his advertising budget would be represented by the integer values along a
line segment that runs between the two points
(3, 750, 4, 500) and (2, 250, 7, 500).
(0, 4, 500) and (2, 250, 0).
(4, 500, 0) and (0, 9, 000).
(4, 500, 5, 250) and (2, 250, 9, 000).