Suppose an ocean-front hotel rents rooms. in the winter, demand is: p_1 = 80 - 2q_1 with marginal revenue of: mr_1 = 80-4q_1. however, in the summer, demand is: p_2 = 140 - 2q_2 with marginal revenue of: mr_2 = 140-4q_2. furthermore, suppose the hotel's marginal cost of providing rooms is mc = 20 + 2q, which is increasing in q due to capacity constraints. suppose the hotel engages in peak-load pricing. during the winter, the profit-maximizing price is s and the profit-maximizing quantity is rooms. (enter numeric responses rounded to two decimal places.)

Abigail spent $100 on a new edition of the personal finance textbook rather than $75 for a used copy. the additional cost for the new copy is called the

U.s. internet advertising revenue grew at the rate of r(t) = 0.82t + 1.14 (0 ≤ t ≤ 4) billion dollars/year between 2002 (t = 0) and 2006 (t = 4). the advertising revenue in 2002 was $5.9 billion.† (a) find an expression f(t) giving the advertising revenue in year t.

An investor purchases 500 shares of nevada industries common stock for $22.00 per share today. at t = 1 year, this investor receives a $0.42 per share dividend (which is not reinvested) on the 500 shares and purchases an additional 500 shares for $24.75 per share. at t = 2 years, he receives another $0.42 (not reinvested) per share dividend on 1,000 shares and purchases 600 more shares for $31.25 per share. at t = 3 years, he sells 1,000 of the shares for $35.50 per share and the remaining 600 shares at $36.00 per share, but receives no dividends. assuming no commissions or taxes, the money-weighted rate of return received on this investment is closest to: