In: Economics
you have $100 to invest in two different investment projects, A and B, the total returns from which (TR and TR) are given below. the cost of purchasing a unit of investment in each project is $10 per unit. your problem is to invest the $100 in the two invest the $100 in the two investments so as to maximize your total return (for example, if you invested the entire $100 in investment B, you would receive a total return of $105.) what is the general principle that defines the maximizing allocation of the $100 among the investment options?
| # units | TR A | TR B | 
| 1 | $20 | $15 | 
| 2 | 38 | 29 | 
| 3 | 54 | 42 | 
| 4 | 68 | 54 | 
| 5 | 80 | 65 | 
| 6 | 90 | 75 | 
| 7 | 98 | 84 | 
| 8 | 104 | 92 | 
| 9 | 108 | 99 | 
| 10 | 110 | 105 |