Respuesta :
Answer:
Optimal investment amount = $300
Step-by-step explanation:
discount = x
original price = 10,000
discount% = 7%
x/10,000 = 7/100
x · 100 = 7 · 10,000
100x = 70,000
100x/100 = 70,000/100
x = 700
discount = x
original price = 10,000
discount% = 8%
x/10,000 = 8/100
x · 100 = 8 · 10,000
100x = 80,000
100x/100 = 80,000/100
x = 800
discount = x
original price = 10,000
discount% = 12%
x/10,000 = 12/100
x · 100 = 12 · 10,000
100x = 120,000
100x/100 = 120,000/100
x = 1,200
So:
$1,200 - $800 - $700 = $300
We max out the high return investment, $2000 for 12%.
We have $8000 left to invest and we want to put as much in CDs at 8% as possible. Let's call b the bond investment and c the CD investment. We have
b ≥ 3c
Since munis have the lower return we want as many CDs as possible. So we choose:
b = 3c
b + c = 8000
3c + c = 8000
4c = 8000
c = 2000
That leaves b=3c=6000 for bonds.
Answer: $6000 in bonds, $2000 in CDs, $2000 in high-risk.