Thinking Mathematically 8th Edition By Robert Blit
Thinking Mathematically 8th Edition By Robert Blit
Exam (elaborations)
Solutions Manual For Thinking Mathematically 8th Edition By Robert Blitzer (All Chapters, 100% Original Verified, A+ Grade)
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Thinking Mathematically 8th Edition By Robert Blit
Institution
Thinking Mathematically 8th Edition By Robert Blit
This Is The Original 8th Edition Of The Solution Manual From The Original Author All Other Files In The Market Are Fake/Old Editions. Other Sellers Have Changed The Old Edition Number To The New But The Solution Manual Is An Old Edition.
Solutions Manual For Thinking Mathematically 8th Edition ...
Part 2: Ch 8-14: Page 2-343
Part 1: Ch 1-7: Page 344-721
, Chapter 8
Personal Finance
Checkpoints 8.1 20% of $960 = 0.20 $960 = $192
Taxes for year 2 are $960 + $192 = $1152
1
1. Step 1: = 1 8 = 0.125
8 $1200 − $1152 $48
b. = = 0.04 = 4%
Step 2: 0.125 100 = 12.5 $1200 $1200
Step 3: 12.5% Taxes for year 2 are 4% less than the original
amount.
2. 0.023 = 2.3%
3. a. 67% = 0.67 Concept and Vocabulary Check 8.1
b. 250% = 2.50 = 2.5 C1. 100
4. a. 6% of $1260 = 0.06 $1260 = $75.60 C2. 7; 8; 100; a percent sign
The tax paid is $75.60
C3. two; right; a percent sign
b. $1260.00 + $75.60 = $1335.60
C4. two; left; a percent sign
The total cost is $1335.60
C5. tax rate; item’s cost
5. a. 35% of $380 = 0.35 $380 = $133
The discount is $133 C6. discount rate; original price
b. $380 − $133 = $247 C7. the amount of increase; the original amount
The sale price is $247
C8. the amount of decrease; the original amount
amount of increase
6. a. Percent of increase = C9. false; Changes to make the statement true will vary.
original amount
A sample change is: Only 6 reindeer remain.
4
= = 0.66 23 = 66 23 %
6 C10. false; Changes to make the statement true will vary.
A sample change is: You spent $500 on gifts.
amount of decrease
b. Percent of decrease =
original amount
4 Exercise Set 8.1
= = 0.4 = 40%
10
2
1. = 2 5 = 0.4 = 40%
7. Amount of decrease: $940 − $611 = $329 5
amount of decrease $329
= = 0.35 = 35% 3
original amount $940 2. = 3 5 = 0.6 = 60%
5
There was a 35% decrease in price.
8. Amount of increase: 12% − 10% = 2% 9
9 10 0.9 90%
amount of increase 2% 10
= = 0.2 = 20%
original amount 10%
3
There was a 20% increase for this episode. 4. = 3 4 = 0.75 = 75%
4
3
3 6 0.5 50%
9. a. 20% of $1200 = 0.20 $1200 = $240 6
Taxes for year 1 are $1200 − $240 = $960
43. A = PB 61 − 25 36
3 = P 15 54. = = 1.44 = 144%
25 25
3 P 15
=
15 15 840 − 714
55. = 0.15 = 15%
0.2 = P 840
P = 20%
380 − 266
56. = 0.30 = 30%
44. A = PB 380
18 = P 90
57. Amount after first year
18 P 90
= = 10,000 – (0.3)(10,000)
90 90 = $7000
0.2 = P Amount after second year
P = 20% = 7000 + (0.4)(7000)
= $9800
45. A = PB Your adviser is not using percentages properly.
0.3 = P 2.5 Actual change:
0.3 P 2.5 10,000 − 9800
= = 0.02 = 2% loss.
2.5 2.5 10,000
0.12 = P
58. The salesman is misusing percentages.
P = 12% 100% − 30% = 70%
46. A = PB 20% of 70% = 0.70(0.20) = 0.14 = 14%
0.6 = P 7.5 Percent reduction = 30% + 14% = 44%
0.6 P 7.5
= 59. - 64. Answers will vary.
7.5 7.5
0.08 = P 65. does not make sense; Explanations will vary.
P = 8% Sample explanation: 20% of $80 is $16. This will
make the total $96.
47. a. (0.06)(32,800) = $1968
66. does not make sense; Explanations will vary.
b. 32,800 + 1968 = $34,768 Sample explanation: A price can not drop more than
100%.
48. a. (0.07)(96) = $6.72
67. does not make sense; Explanations will vary.
b. 96 + 6.72 = $102.72 Sample explanation: Since 1.011.01 = 1.0201 the
percent of increase is 2.01%.
49. a. (0.12)(860) = $103.20
68. does not make sense; Explanations will vary.
b. 860 – 103.20 = $756.80 Sample explanation: The increase is
30% − 20% 10% 1
= = = 0.5 = 50% .
50. a. (0.40)(16.50) = $6.60 20% 20% 2
b. 16.50 – 6.60 = $9.90 69. First, find the discount amount.
15% $720 = 0.15 $720 = $108
70 Next, find the sales price.
51. 0.192 = 19.2%
365 $720 − $108 = $612
Then, find the tax.
52.
37
0.101 = 10.1% 6% $612 = 0.06 $612 = $36.72
365 Finally, find the total cost.
$612 + $36.72 = $648.72
71 − 25 46 Percent reduction = 30% + 14% = 44%
53. = = 1.84 = 184%
25 25
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