The Weber Company purchased a mining site for $500,000 on July 1, 2009. The company expects to mine ore for the next 10 years and anticipates that a total of 100,000 tons will be recovered. The estimated residual value of the property is $80,000. During 2009 the company extracted 4,000 tons of ore. The depletion expense for 2009 is

Andy purchases only two goods, apples (a) and kumquats (k). he has an income of $125 and can buy apples at $5 per pound and kumquats at $5 per pound. his utility function is u(a, k) = 6a + 2k. what is his marginal utility for apples and his marginal utility for kumquats? andy's marginal utility for apples (mu subscript a) is mu subscript aequals 6 and his marginal utility for kumquats (mu subscript k) is