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(I have already posted this, but was not sure how the person explained it. If po

ID: 3037035 • Letter: #

Question

(I have already posted this, but was not sure how the person explained it. If possible, please write it out and show how to go about it)

Investment. A trust account manager has $240,000 to be invested. The investment choices have current yields of 8%, 7% and 10%. Suppose that the investment goal is to earn interest of $18,000, and risk factors make it prudent to invest some money in all three investments. a. Find a general description for the amounts invested at three rates. b. If $10,000 is invested at 10%, how much will be invested at each of the other rates? c. What is the maximum amount that will be invested at 7%, and in this case how much will be invested at the other rates? d. What is the minimum amount that will be invested at 7%, and in this case how much will be invested at the other rates?

Explanation / Answer

I am again the same person as my answer were:

1) $10,000 at 10% and by Taking X at 8 % and $230,000 - X at 7 %

By equating with total interest as $18,000 we get

$90,000 at 8% and $140,000 at 7%

2) Maximum invested in 7 %

In this case total interest should be reached $18K so to maximize amount in 7% and to fulfill our needs we have to invest remaining amount at 10%

i.e. X in 7% and $240,000 - X in 10%

Again by equating with $18k we got X =$200,000 max. possible in 7 % and $40,000 in 10%

3) Similarly for minimum case:

to fulfill our needs and to minimize amount in 7% = max money should be used to reach goal and if we use 10% investment option we will reach our goal with less money...So we have to avoid 10% investment option to minimize money in 7%

$120,000 in both 7% and 8%

For general case let's assume A amount at 7% and B at 8% and remaining $240,000 - A - B at 10%

18000 = 7A/100 + 8B/100 + (240000 - A -B)/10

Hoping everything is clear this time