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KU122: Introduction to Math Skills and
StrategiesProf. Susan DiMarino
Unit 4 Seminar
Announcements/Reminders
You can retake ONE of the MML Quizzes (there are 4 total). You must e-mail me if/when you want to take a quiz over.
You MUST show EACH of the steps in your project to get full credit. You can either show it in words or using numbers/symbols.
Slide 4- 3Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-Wesley
RatioA ratio is the quotient of two quantities.
For every 50 chicks raised, 3 die within the first two days. The ratio of the number of chicks that die to the number raised is shown by fraction notation
3, or by the notation 3:50.
50
Slide 4- 4Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-Wesley
Ratio Notation
The ratio of a to b is given by the fraction notation , where a is the numerator and b is the denominator, or by the colon notation a : b.
a
b
Slide 4- 5Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-Wesley
RateWhen a ratio is used to compare two different kinds of measure, we call it a rate.
Slide 1- 6Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.1
1.Write fraction notation for the ratio 56 to 81.
a)
b)
c)
d)
81
56
25
8181
25
56
81
Slide 1- 7Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.1
1.Write fraction notation for the ratio 56 to 81.
a)
b)
c)
d)
81
56
25
8181
25
56
81
Slide 1- 8Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.1
3. On a map, 1 ½ inches represents 45 miles. If two cities are 5 in. apart on the map, how far are they apart in reality?
a) 91 miles
b) 150 miles
c) 225 miles
d) 338 miles
Slide 1- 9Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.1
3. On a map, 1 ½ inches represents 45 miles. If two cities are 5 in. apart on the map, how far are they apart in reality?
a) 91 miles
b) 150 miles
c) 225 miles
d) 338 miles
Slide 1- 10Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.2
1. Find decimal notation for 19%.
a) 0.019
b) 0.19
c) 1.9
d) 19
Slide 1- 11Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.2
1. Find decimal notation for 19%.
a) 0.019
b) 0.19
c) 1.9
d) 19
Percent and Fraction Notation
Tell me ways that we use percent notations in our everyday lives:
Slide 1- 13Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.2
2. Find percent notation for 0.382.
a) 0.382%
b) 3.82%
c) 38.2%
d) 382%
Slide 1- 14Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.2
2. Find percent notation for 0.382.
a) 0.382%
b) 3.82%
c) 38.2%
d) 382%
Slide 1- 15Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.3
1. Find percent notation for
a) 21%
b) 23.8%
c) 42%
d) 105%
21.
50
Slide 1- 16Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.3
1. Find percent notation for
a) 21%
b) 23.8%
c) 42%
d) 105%
21.
50
Slide 1- 17Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.3
2. Find fraction notation for 12.5%.
a)
b)
c)
d)
5
4
3
5013
100
1
8
Slide 1- 18Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.3
2. Find fraction notation for 12.5%.
a)
b)
c)
d)
5
4
3
5013
100
1
8
Slide 1- 19Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.4
1. What is 35% of 70?
a) 24.5
b) 35
c) 50
d) 200
Slide 1- 20Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.4
1. What is 35% of 70?
a) 24.5
b) 35
c) 50
d) 200
Slide 1- 21Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.4
2. What percent of 32 is 28?
a) 114%
b) 87.5%
c) 80%
d) 70%
Slide 1- 22Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.4
2. What percent of 32 is 28?
a) 114%
b) 87.5%
c) 80%
d) 70%
Slide 1- 23Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.5
1. 9 is 25% of what?
a) 225
b) 36
c) 12
d) 2.25
Slide 1- 24Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.5
1. 9 is 25% of what?
a) 225
b) 36
c) 12
d) 2.25
Slide 1- 25Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.6
1. A person earns $31,400 one year and receives a 4% raise in salary. What is the new salary?
a) $37,500
b) $35,400
c) $34,540
d) $32,656
Slide 1- 26Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.6
1. A person earns $31,400 one year and receives a 4% raise in salary. What is the new salary?
a) $37,500
b) $35,400
c) $34,540
d) $32,656
Slide 1- 27Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.7
1. The sales tax on a television is $48.75 and the sales tax rate is 6.5%. Find the purchase price (price before taxes are added).
a) $317
b) $553
c) $750
d) $799
Slide 1- 28Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.7
1. The sales tax on a television is $48.75 and the sales tax rate is 6.5%. Find the purchase price (price before taxes are added).
a) $317
b) $553
c) $750
d) $799
Slide 1- 29Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.7
2. A fax machine normally retails for $165, but is now on sale 18% off. What is the sale price?
a) $147.00
b) $135.30
c) $123.05
d) $29.70
Slide 1- 30Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.7
2. A fax machine normally retails for $165, but is now on sale 18% off. What is the sale price?
a) $147.00
b) $135.30
c) $123.05
d) $29.70
Slide 1- 31Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.7
3. What is the simple interest on a principal of $640 at the interest rate of 3.8% for 1 year?
a) $24.32
b) $54.32
c) $92.42
d) $168.42
Slide 1- 32Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.7
4. Find the amount in the account if $2000 is invested at 6 1/8% compounded annually for 2 years.
a) $2252.50
b) $2246.83
c) $2245.00
d) $2007.50
Slide 1- 33Copyright © 2008 Pearson Education, Inc. Publishing as Pearson
Addison-WesleySection 4.7
4. Find the amount in the account if $2000 is invested at 6 1/8% compounded annually for 2 years.
a) $2252.50
b) $2246.83
c) $2245.00
d) $2007.50
Unit 4 Assignments
The following assignments are due by 11:59pm ET on Tuesday:
1.) Live seminar
2.) Discussion
3.) Practice Problems
4.) MML Ungraded Tutorials
5.) MML Quiz
