Jeffrey earned a gross income of $67,930 last year. he made $2,173.93 in student loan interest deductions, donated $2,824 to his favorite charities and paid $3,117.56 in home mortgage interest. jeffrey claims a standard deduction of $11,400 for himself and his non-working spouse. if their exemption is $7,300, what is their taxable income? a. $47,056.07 b. $52,514.51 c. $43,938.51 d. $41,114.51

Suppose life expectancy in years (l) is a function of two inputs, health expenditures (h) and nutrition expenditures (n) in hundreds of dollars per year. the production function is upper l equals ch superscript 0.40 baseline upper n superscript 0.60l=ch0.40n0.60. beginning with c = 1, a health input of $400400 per year (hequals=44) and a nutrition input of $400400 per year (nequals=44), show that the marginal product of health expenditures and the marginal product of nutrition expenditures are both decreasing. the marginal product of health expenditures when h goes from 44 to 55 is nothing, and the marginal product of health when h goes from 66 to 77 is nothing. (round your answers to three decimal places.)