In Problems 39-47, construct a mathematical model in the form of a linear programming problem. Do not solve. Investment strategy. An investor is planning to divide her investments among high-tech mutual funds, global mutual funds, corporate bonds, municipal bonds, and CDs. Each of these investments has an estimated annual return and a risk factor (see the table). The risk level for each choice is the product of its risk factor and the percentage of the total funds invested in that choice. The total risk level is the sum of the risk levels for all the investments. The investor wants at least 20 % of her investments to be in CDs and does not want the risk level to exceed 1.8 . What percentage of her total investments should be invested in each choice to maximize the return?
In Problems 39-47, construct a mathematical model in the form of a linear programming problem. Do not solve. Investment strategy. An investor is planning to divide her investments among high-tech mutual funds, global mutual funds, corporate bonds, municipal bonds, and CDs. Each of these investments has an estimated annual return and a risk factor (see the table). The risk level for each choice is the product of its risk factor and the percentage of the total funds invested in that choice. The total risk level is the sum of the risk levels for all the investments. The investor wants at least 20 % of her investments to be in CDs and does not want the risk level to exceed 1.8 . What percentage of her total investments should be invested in each choice to maximize the return?
In Problems 39-47, construct a mathematical model in the form of a linear programming problem. Do not solve.
Investment strategy. An investor is planning to divide her investments among high-tech mutual funds, global mutual funds, corporate bonds, municipal bonds, and CDs. Each of these investments has an estimated annual return and a risk factor (see the table). The risk level for each choice is the product of its risk factor and the percentage of the total funds invested in that choice. The total risk level is the sum of the risk levels for all the investments. The investor wants at least
20
%
of her investments to be in CDs and does not want the risk level to exceed
1.8
. What percentage of her total investments should be invested in each choice to maximize the return?
A tank contains 60 kg of salt and 2000 L of water. Pure water enters a tank at the rate 8 L/min. The
solution is mixed and drains from the tank at the rate 11 L/min.
Let y be the number of kg of salt in the tank after t minutes.
The differential equation for this situation would be:
dy
dt
y(0) =
Simplify the below expression.
3 - (-7)
Solve the initial value problem:
y= 0.05y + 5
y(0) = 100
y(t) =
Chapter 6 Solutions
Finite Mathematics for Business, Economics, Life Sciences and Social Sciences
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