CHAPTER 4 - ANSWERS
EXERCISES 4A
| 1. | a) 11.18 | b) 62.5% | c) 170 | d) 13.8 | e) 250% |
| f) 360 | g) $99 | h) 4.5% | i) $40 |
| 2. | a) 40% | b) 83.33% | c) 250% | d) 37.5% | e) .025% |
| 3. | a) 9/10 | b) 17/20 | c) 9/4 | d) 1/25 | e) 7/8 |
| 4. | a) She saves $64.80, and pays $295.20 for the bracelet. |
| b) 25% c) 72.22% d) $374.40 e) $336.96 |
| 5. | a) 20% | b) $80 , $16 | c) $77.90 |
| 6. | Elmo paid $4.84, and the regular price was $8.80. |
| 7. | a) 36% | b) 5% | c) 11.61% | d) 81¢ |
| 8. | a) $1.80 | b) 27¢ | c) $1.15 | d) 36.25% |
| 9. | a) $54.40 | b) 15% | c) 15.9% | d) $2.05 |
| e) $3.60 | f) $53.20 , 44% | g) 72% |
EXERCISES 4B
| 1. | a) $5400 | b) $1944 | c) $204 |
| 2. | $32 |
| 3. | a) $3600 | b) $600 | c) 10% |
| 4. | a) $937.50 | b) $131.25 |
| 5. | a) $800 | b) $4800 | c) $600 | d) 2.5 years |
| 6. | $53.04 |
EXERCISES 4C
| 1. | a) $1095 | b) $16.20 | c) $1774.20 |
| 2. | a) $7.44 | b) $584 | c) 15% |
EXERCISES 4D
| 1. | a) $808.00 | b) $816.08 | c) $824.24 | d) $901.46 | e) $1078.28 |
| 2. | a) $13,498.37 | b) $13,513.95 | c) $13,521.90 |
| d) $13,527.26 | e) $13,529.34 | f) $13,529.87 |
| 3. | $42,871.78 |
| 4. | a) $118,777.79 | b) $63,143.12 |
| 5. | a) $143,884.08 | b) $6,950.04 | c) $20,702,629 |
| 6. | a) 5.80% | b) 5.83% | c) 5.85% | d) 5.81% |
| Jill should choose plan (c). | ||||
| 7. | $1.91 |
| 8. | a) 14,288 forint | b) 126 forint | c) 100 forint | d) 254,064 forint |
| 9. | a) $48.32 | b) $30.79 |
| 10. | 143,748 som per year |
EXERCISES 4E
| 1. | a) $20,025.13 | b) $18,000.00 | c) $2,025.13 | d) $624.22 |
| 2. | a) $915.46 | b) 900.00 | c) $15.46 |
| 3. | a) check size = $378,719.11 | , | interest earned = $318,719.11 |
| b) check size = $373,387.75 | , | interest earned = $295,387.75 | |
| c) check size = $126,320.36 | , | interest earned = $86,320.36 | |
| d) check size = $374,879.54 | , | interest earned = $284,879.54 |
| 4. | $35.51 |
EXERCISES 4F
| 1. | Monthly Payment | Total Payments | Total Interest | |
| a) | $1,687.71 | $303,787.80 | $103,787.80 | |
| b) | $1,467.69 | $352,245.60 | $152,245.60 | |
| c) | $1,362.94 | $408,882.00 | $208,882.00 | |
| d) | $1,357.58 | $488,728.80 | $288,728.80 |
| 2. | a) $667.33 | b) $40,039.80 | c) $10,039.80 |
| d) |
Payment Number |
Total Payment |
Amount to Interest |
Amount to Principal |
Balance $30,000.00 |
| 1 | $667.33 | $300.00 | $367.33 | $29,632.67 |
| 2 | $667.33 | $296.33 | $371.00 | $29,261.67 |
| 3 | $667.33 | $292.62 | $374.71 | $28,886.96 |
| 3. |
Payment Number |
Total Payment |
Amount to Interest |
Amount to Principal |
Balance $30,000.00 |
| 1 | $716.43 | $500.00 | $216.43 | $99,783.57 |
| 2 | $716.43 | $498.92 | $217.51 | $99,566.06 |
| 3 | $716.43 | $497.83 | $218.60 | $99,347.46 |
| 4 | $716.43 | $496.74 | $219.69 | $99,127.77 |
EXERCISES 4G
| 1. | a) $742.77 | b) $267,397.20 | c) $147,397.20 |
| 2. | $161,577.99 |
| 3. | monthly payment = $859.72 , amount received = $206,332.80 |
| 4. | a) $4,612.07 | b) $2,767,242 | c) $1,767,242 |
| 5. | Monthly Payment | Total Amount | |
| (A) | $624.33 | $112,379.40 | |
| (B) | $545.80 | $130,992.00 | |
| (C) | $515.44 | $154,632.00 |
| 6. | a) $120,000.00 | b) $498,526.60 | c) $3,235.23 | d) $776,455.20 |
| 7. | $416.86 |