Problem Solving Approach to Mathematics for Elementary School Teachers
Problem Solving Approach to Mathematics for Elementary School Teachers
13th Edition
ISBN: 9780135184097
Author: BILLSTEIN
Publisher: PEARSON CO
bartleby

Concept explainers

Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 …
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experime…
bartleby

Videos

Textbook Question
Book Icon
Chapter 13.1B, Problem 23A

Astronomers use a light-year to measure distance. A light-year is the distance light travels in 1 yr. The speed of light is approximately 300,000km/sec.

a. How long is 1 light-year in kilometers?

b. The nearest star (other than the sun) is Alpha Centauri. It is 4.34 light-years from Earth. How far is that in kilometers?

c. How long will it take a rocket travelling 60,000 km/hr to reach Alpha Centauri?

Expert Solution & Answer
Check Mark

Want to see the full answer?

Check out a sample textbook solution
Blurred answer
Previous
Chapter 13.1B, Problem 22A
Next
Chapter 13.1B, Problem 24A
Students have asked these similar questions
17. Suppose we know that the graph below is the graph of a solution to dy/dt = f(t). (a) How much of the slope field can you sketch from this information? [Hint: Note that the differential equation depends only on t.] (b) What can you say about the solu- tion with y(0) = 2? (For example, can you sketch the graph of this so- lution?) y(0) = 1 y AN
Write out and explain your steps to each of these problems.
Calculate the area and perimeter

Chapter 13 Solutions

Problem Solving Approach to Mathematics for Elementary School Teachers

Ch. 13.1 - In track, the second lane from the inside of the...Ch. 13.1 - Observe that it is possible to build a triangle...Ch. 13.1 - A student asks why 227 cannot always be used as...Ch. 13.1 - A Student imagines a wire stretched around Earth....Ch. 13.1 - Prob. 12MCCh. 13.1 - Which of these units would be the best to use to...Ch. 13.1 - If Freds rope is 12 inches long, about how long is...Ch. 13.1 - The circumference of a circular piece of wood is...Ch. 13.1A - Use the following picture of a ruler to find each...Ch. 13.1A - Prob. 2A
Ch. 13.1A - Complete each of the following. a. 100 in....Ch. 13.1A - Prob. 4ACh. 13.1A - Estimate the length of the following segment and...Ch. 13.1A - Prob. 6ACh. 13.1A - Repeat exercise 6 using English measures. 6....Ch. 13.1A - Prob. 8ACh. 13.1A - Prob. 9ACh. 13.1A - Prob. 10ACh. 13.1A - List the following in decreasing order: 8 cm,...Ch. 13.1A - Prob. 12ACh. 13.1A - a. What is the length of a semicircle of a circle...Ch. 13.1A - Prob. 14ACh. 13.1A - Complete each of the following. a. 10 mm =______cm...Ch. 13.1A - Prob. 16ACh. 13.1A - Can the following be the lengths of the sides of a...Ch. 13.1A - Prob. 18ACh. 13.1A - Take an 81211-in. piece of paper, fold it as shown...Ch. 13.1A - Prob. 20ACh. 13.1A - What happens to the circumference of a circle if...Ch. 13.1A - Prob. 22ACh. 13.1A - Prob. 23ACh. 13.1A - Prob. 24ACh. 13.1A - Prob. 25ACh. 13.1A - Prob. 26ACh. 13.1A - Suppose you have three concentric circles and are...Ch. 13.1B - Use the following picture of ruler to find each of...Ch. 13.1B - Estimate and then measure each of the following in...Ch. 13.1B - Convert each of the following to the indicated...Ch. 13.1B - Prob. 5ACh. 13.1B - Prob. 6ACh. 13.1B - Prob. 7ACh. 13.1B - Prob. 8ACh. 13.1B - If eggs were sold in the United States using...Ch. 13.1B - List the following in decreasing order:...Ch. 13.1B - Draw each of the following as accurately as...Ch. 13.1B - The following figure is a circle whose radius is 2...Ch. 13.1B - Prob. 14ACh. 13.1B - Complete each of the following conversions. a. 35...Ch. 13.1B - Prob. 16ACh. 13.1B - Can the following be the lengths of the sides of a...Ch. 13.1B - Prob. 18ACh. 13.1B - Prob. 20ACh. 13.1B - For each of the following, if a circle has the...Ch. 13.1B - Prob. 22ACh. 13.1B - Astronomers use a light-year to measure distance....Ch. 13.1B - Give the greatest possible error for each of the...Ch. 13.1B - a. Find the length of a 48 arc of a circle whose...Ch. 13.1B - Find the radius of the circle containing 60 arc...Ch. 13.1B - Prob. 27ACh. 13.2 - The three midsegments of a triangle divide it into...Ch. 13.2 - Prob. 2MCCh. 13.2 - Prob. 3MCCh. 13.2 - Prob. 4MCCh. 13.2 - Prob. 5MCCh. 13.2 - Prob. 6MCCh. 13.2 - Prob. 7MCCh. 13.2 - Prob. 8MCCh. 13.2 - Prob. 9MCCh. 13.2 - a. A sector in circle with center O and radius 10...Ch. 13.2 - In the following right triangle, AB=10,AC=6,CB=8 ....Ch. 13.2 - Prob. 13MCCh. 13.2 - Prob. 14MCCh. 13.2 - Prob. 15MCCh. 13.2 - Prob. 16MCCh. 13.2 - Prob. 17MCCh. 13.2 - Prob. 18MCCh. 13.2 - Ori claims that to find the area of a...Ch. 13.2 - Prob. 20MCCh. 13.2 - In Figure 29, we found the area of a kite using...Ch. 13.2 - Prob. 22MCCh. 13.2 - Prob. 23MCCh. 13.2 - Prob. 25MCCh. 13.2 - Prob. 26MCCh. 13.2 - Prob. 27MCCh. 13.2 - Prob. 28MCCh. 13.2 - Prob. 29MCCh. 13.2 - Prob. 1NAEPCh. 13.2 - Which figure has the greatest area? A. A B. BC....Ch. 13.2 - Prob. 3NAEPCh. 13.2 - Prob. 4NAEPCh. 13.2 - On the scale drawing above, the shaded area...Ch. 13.2A - Choose the most appropriate metric unit cm2, m2 or...Ch. 13.2A - Estimate and then measure the area of the each of...Ch. 13.2A - Prob. 4ACh. 13.2A - Complete the following conversions a. 4000ft2=yd2...Ch. 13.2A - Find the area of each of the following figures if...Ch. 13.2A - Complete each of the following sentences a. A...Ch. 13.2A - Prob. 8ACh. 13.2A - Prob. 9ACh. 13.2A - Prob. 10ACh. 13.2A - Find the area of each of the following...Ch. 13.2A - a. A rectangular piece of land is 1300m1500m i....Ch. 13.2A - Prob. 13ACh. 13.2A - Prob. 14ACh. 13.2A - Find the cost of carpeting the following rectangle...Ch. 13.2A - Prob. 16ACh. 13.2A - Joe uses stick on square carpet tiles to cover his...Ch. 13.2A - Prob. 18ACh. 13.2A - Prob. 19ACh. 13.2A - Prob. 20ACh. 13.2A - Prob. 21ACh. 13.2A - Prob. 22ACh. 13.2A - Prob. 23ACh. 13.2A - Prob. 24ACh. 13.2A - Prob. 25ACh. 13.2A - Prob. 26ACh. 13.2A - Prob. 27ACh. 13.2A - Prob. 28ACh. 13.2A - Prob. 29ACh. 13.2A - Prob. 30ACh. 13.2A - Prob. 31ACh. 13.2A - Prob. 32ACh. 13.2A - Prob. 33ACh. 13.2A - Prob. 34ACh. 13.2A - Prob. 35ACh. 13.2B - Choose the most appropriate metric unit cm2, m2 or...Ch. 13.2B - Prob. 3ACh. 13.2B - Complete the following conversion table m2 cm2 mm2...Ch. 13.2B - Complete the following conversions a. 99ft2=yd2 b....Ch. 13.2B - Find the areas of each of the following figures if...Ch. 13.2B - Prob. 7ACh. 13.2B - Find the area of ABC in each of the following...Ch. 13.2B - a. If triangle ABC is similar to triangle DEF and...Ch. 13.2B - Find the area of each of the following...Ch. 13.2B - a. A rectangular piece of land is 1.2km by 900m i....Ch. 13.2B - a. If the area of a rectangle remains constant but...Ch. 13.2B - Prob. 14ACh. 13.2B - Prob. 15ACh. 13.2B - Prob. 16ACh. 13.2B - Prob. 17ACh. 13.2B - Prob. 18ACh. 13.2B - Prob. 19ACh. 13.2B - Prob. 21ACh. 13.2B - If the area of a square is 169in2, what is its...Ch. 13.2B - Prob. 23ACh. 13.2B - Prob. 24ACh. 13.2B - Prob. 25ACh. 13.2B - Prob. 26ACh. 13.2B - A store has wrapping paper on sale, One packed is...Ch. 13.2B - Prob. 28ACh. 13.2B - Prob. 29ACh. 13.2B - Prob. 30ACh. 13.2B - Prob. 31ACh. 13.2B - Prob. 32ACh. 13.2B - Prob. 33ACh. 13.2B - Prob. 34ACh. 13.2B - Prob. 35ACh. 13.2B - Prob. 36ACh. 13.2B - What is the length of the side of a square with...Ch. 13.2B - Prob. 38ACh. 13.3 - Mathematical Connections Given a square, describe...Ch. 13.3 - Prob. 2MCCh. 13.3 - Mathematical Connections The sum of the squares of...Ch. 13.3 - Mathematical Connections Explain how to construct...Ch. 13.3 - Mathematical Connections A Pythagorean triple is a...Ch. 13.3 - Mathematical Connections Explain how to adapt the...Ch. 13.3 - Mathematical Connections In the figure shown,...Ch. 13.3 - Mathematical Connections Find the area of ABC if...Ch. 13.3 - Mathematical Connections The height of an...Ch. 13.3 - Mathematical Connections Two concentric circles...Ch. 13.3 - Mathematical Connections Find the distance between...Ch. 13.3 - Mathematical Connections Construct two squares of...Ch. 13.3 - Prob. 13MCCh. 13.3 - Prob. 17MCCh. 13.3 - MATHEMATICAL CONNECTIONS One leg of a right...Ch. 13.3 - Prob. 19MCCh. 13.3 - Prob. 20MCCh. 13.3 - Prob. 21MCCh. 13.3 - Prob. 22MCCh. 13.3 - Prob. 24MCCh. 13.3 - Prob. 25MCCh. 13.3 - Prob. 26MCCh. 13.3 - Prob. 27MCCh. 13.3 - Prob. 29MCCh. 13.3 - National Assessment of Educational ProgressNAEP...Ch. 13.3 - Prob. 2NAEPCh. 13.3A - Prob. 1ACh. 13.3A - Prob. 2ACh. 13.3A - Prob. 3ACh. 13.3A - If the hypotenuse of a right is 30 cm long and one...Ch. 13.3A - For each of the following, determine whether the...Ch. 13.3A - Prob. 8ACh. 13.3A - Prob. 9ACh. 13.3A - Prob. 10ACh. 13.3A - Prob. 11ACh. 13.3A - Find the area of each of the following figuresCh. 13.3A - Find the area of each rhombus given below.Ch. 13.3A - Prob. 14ACh. 13.3A - A company wants to lay a string of buoys across a...Ch. 13.3A - Prob. 17ACh. 13.3A - Prob. 18ACh. 13.3A - Prob. 19ACh. 13.3A - Prob. 20ACh. 13.3A - If the length of the hypotenuse in a 306090...Ch. 13.3A - Prob. 22ACh. 13.3A - Prob. 23ACh. 13.3A - Prob. 24ACh. 13.3A - A boat starts at point A, moves 3 km due north,...Ch. 13.3A - Prob. 26ACh. 13.3A - The diagonals of a rhombus are 8 in. and 12 in....Ch. 13.3A - Prob. 28ACh. 13.3B - Prob. 1ACh. 13.3B - Prob. 2ACh. 13.3B - Prob. 3ACh. 13.3B - Prob. 5ACh. 13.3B - Prob. 6ACh. 13.3B - For each of the following, determine whether the...Ch. 13.3B - Prob. 8ACh. 13.3B - Prob. 9ACh. 13.3B - Prob. 10ACh. 13.3B - Prob. 11ACh. 13.3B - Prob. 12ACh. 13.3B - Prob. 13ACh. 13.3B - Prob. 14ACh. 13.3B - On a baseball field 90-ft square if a player...Ch. 13.3B - Prob. 16ACh. 13.3B - Prob. 17ACh. 13.3B - Prob. 18ACh. 13.3B - Prob. 19ACh. 13.3B - Prob. 20ACh. 13.3B - Prob. 21ACh. 13.3B - Prob. 22ACh. 13.3B - Prob. 23ACh. 13.3B - Prob. 24ACh. 13.3B - Prob. 25ACh. 13.3B - Prob. 26ACh. 13.3B - Prob. 27ACh. 13.3B - Prob. 28ACh. 13.3B - Prob. 29ACh. 13.3B - Prob. 30ACh. 13.4 - Tennis balls are packed tightly three to a can...Ch. 13.4 - Prob. 2MCCh. 13.4 - In the drawing below, cube B was cut from a larger...Ch. 13.4 - Prob. 4MCCh. 13.4 - Prob. 5MCCh. 13.4 - Prob. 6MCCh. 13.4 - Prob. 7MCCh. 13.4 - Prob. 8MCCh. 13.4 - Prob. 9MCCh. 13.4 - A student wonders if she triples each measurement...Ch. 13.4 - Prob. 12MCCh. 13.4 - Abi used the formula SA=r(r+l), where r is the...Ch. 13.4 - Prob. 14MCCh. 13.4 - Prob. 15MCCh. 13.4 - Prob. 16MCCh. 13.4 - Prob. 17MCCh. 13.4 - Prob. 18MCCh. 13.4 - Find the perimeters and the areas of the following...Ch. 13.4 - In the following, the length of the diagonal AC of...Ch. 13.4 - Find the length of the diagonal of a cube whose...Ch. 13.4 - Prob. 22MCCh. 13.4 - Convert the following measures. a. 150m=km b....Ch. 13.4 - Which of the following can be folded to form the...Ch. 13.4A - Which of the following nets could be folded along...Ch. 13.4A - Find the surface area of each of the following...Ch. 13.4A - How many litres of paint must you buy to paint the...Ch. 13.4A - Prob. 4ACh. 13.4A - Assume the radius of Earth is 6370 km and Earth is...Ch. 13.4A - Prob. 6ACh. 13.4A - Prob. 7ACh. 13.4A - Prob. 8ACh. 13.4A - The top of a right rectangular box has an area of...Ch. 13.4A - How does the lateral surface area of a right...Ch. 13.4A - Prob. 11ACh. 13.4A - The sector shown is rolled into cone shape so that...Ch. 13.4A - Prob. 13ACh. 13.4A - Prob. 14ACh. 13.4A - If two right circular cones are similar with radii...Ch. 13.4A - Prob. 16ACh. 13.4A - Prob. 17ACh. 13.4A - Prob. 18ACh. 13.4A - Prob. 19ACh. 13.4A - Prob. 20ACh. 13.4A - Prob. 21ACh. 13.4B - Prob. 1ACh. 13.4B - Prob. 2ACh. 13.4B - Prob. 3ACh. 13.4B - Prob. 4ACh. 13.4B - Prob. 5ACh. 13.4B - Prob. 6ACh. 13.4B - Prob. 7ACh. 13.4B - Prob. 8ACh. 13.4B - Prob. 10ACh. 13.4B - Prob. 11ACh. 13.4B - Prob. 13ACh. 13.4B - Prob. 14ACh. 13.4B - If two right cones are similar with radii of the...Ch. 13.4B - Prob. 16ACh. 13.4B - Prob. 17ACh. 13.4B - Prob. 18ACh. 13.4B - In the figure shown, a right circular cylinder is...Ch. 13.4B - Prob. 20ACh. 13.5 - a. Which will increase the volume of a right...Ch. 13.5 - Explain how you would find the volume of an...Ch. 13.5 - Read the following problems i and ii: i. A tank in...Ch. 13.5 - A furniture company gives an estimate for moving...Ch. 13.5 - A cylinder, a cone, and a sphere have the same...Ch. 13.5 - Two stacks of pennies shown are of the same...Ch. 13.5 - Prob. 7MCCh. 13.5 - A diagonal of a cube that is not the diagonal of a...Ch. 13.5 - Prob. 9MCCh. 13.5 - A right circular cylinder has a 4-in. diameter, is...Ch. 13.5 - Prob. 11MCCh. 13.5 - Explore Internet sources to determine if it is...Ch. 13.5 - A student asks whether the volume of a cube can...Ch. 13.5 - Prob. 15MCCh. 13.5 - Prob. 16MCCh. 13.5 - Prob. 17MCCh. 13.5 - Prob. 18MCCh. 13.5 - Prob. 19MCCh. 13.5 - Find the perimeter and area of the following...Ch. 13.5 - Prob. 21MCCh. 13.5 - Prob. 22MCCh. 13.5 - Prob. 23MCCh. 13.5 - Prob. 24MCCh. 13.5 - Prob. 25MCCh. 13.5 - Prob. 1NAEPCh. 13.5 - Prob. 2NAEPCh. 13.5 - Prob. 3NAEPCh. 13.5A - Prob. 1ACh. 13.5A - Prob. 2ACh. 13.5A - Prob. 3ACh. 13.5A - Prob. 4ACh. 13.5A - Prob. 5ACh. 13.5A - Prob. 6ACh. 13.5A - Prob. 7ACh. 13.5A - Prob. 8ACh. 13.5A - Prob. 9ACh. 13.5A - Prob. 10ACh. 13.5A - Prob. 11ACh. 13.5A - Prob. 12ACh. 13.5A - Prob. 13ACh. 13.5A - Prob. 14ACh. 13.5A - Prob. 15ACh. 13.5A - Prob. 16ACh. 13.5A - Prob. 17ACh. 13.5A - Prob. 18ACh. 13.5A - A right rectangular prism with base ABCD at the...Ch. 13.5A - Prob. 20ACh. 13.5A - Prob. 21ACh. 13.5A - Prob. 22ACh. 13.5A - Prob. 23ACh. 13.5A - Prob. 24ACh. 13.5A - Prob. 25ACh. 13.5A - a. Given any rectangle describe ways to decompose...Ch. 13.5A - Prob. 27ACh. 13.5A - Prob. 28ACh. 13.5A - Prob. 29ACh. 13.5A - Prob. 30ACh. 13.5A - Prob. 31ACh. 13.5B - Prob. 1ACh. 13.5B - Prob. 2ACh. 13.5B - Prob. 3ACh. 13.5B - Find the volume of each of the following, a. Right...Ch. 13.5B - Prob. 5ACh. 13.5B - Prob. 7ACh. 13.5B - Prob. 8ACh. 13.5B - Prob. 9ACh. 13.5B - Prob. 10ACh. 13.5B - Prob. 11ACh. 13.5B - Prob. 12ACh. 13.5B - Prob. 13ACh. 13.5B - Prob. 14ACh. 13.5B - Prob. 15ACh. 13.5B - Prob. 16ACh. 13.5B - Prob. 17ACh. 13.5B - Prob. 18ACh. 13.5B - Prob. 19ACh. 13.5B - Prob. 20ACh. 13.5B - Prob. 21ACh. 13.5B - Prob. 22ACh. 13.5B - Prob. 23ACh. 13.5B - A paper clip has a mass of about 1 g. Is it...Ch. 13.5B - Prob. 25ACh. 13.5B - Prob. 26ACh. 13.5B - If the weight of a 1000 bill before it was...Ch. 13.5B - Prob. 28ACh. 13.5B - Prob. 29ACh. 13.5B - Prob. 30ACh. 13.5B - Prob. 31ACh. 13.CR - Complete the following conversions. a. 50ft=yd b....Ch. 13.CR - Prob. 2CRCh. 13.CR - The diagonal of rectangle has measure 1.3m and a...Ch. 13.CR - Prob. 4CRCh. 13.CR - Prob. 5CRCh. 13.CR - Prob. 6CRCh. 13.CR - Prob. 7CRCh. 13.CR - Lines a,bandc are parallel to the line containing...Ch. 13.CR - Prob. 9CRCh. 13.CR - Prob. 11CRCh. 13.CR - Prob. 12CRCh. 13.CR - Prob. 13CRCh. 13.CR - Prob. 14CRCh. 13.CR - Find the surface area and volume of each of the...Ch. 13.CR - Prob. 16CRCh. 13.CR - Prob. 17CRCh. 13.CR - Prob. 18CRCh. 13.CR - Prob. 19CRCh. 13.CR - Prob. 20CRCh. 13.CR - Prob. 21CRCh. 13.CR - Prob. 22CRCh. 13.CR - On a 55 geoboard, a. Draw a polygon whose...Ch. 13.CR - Prob. 24CRCh. 13.CR - Prob. 25CRCh. 13.CR - Prob. 26CRCh. 13.CR - Prob. 27CRCh. 13.CR - Prob. 28CRCh. 13.CR - Prob. 29CRCh. 13.CR - Prob. 30CRCh. 13.CR - Prob. 31CRCh. 13.CR - Prob. 32CRCh. 13.CR - Prob. 33CRCh. 13.CR - Prob. 34CRCh. 13 - Prob. 4NTCh. 13 - Prob. 6NTCh. 13 - Prob. 7NTCh. 13 - Prob. 8NT

Additional Math Textbook Solutions

Find more solutions based on key concepts
1. How is a sample related to a population?

Elementary Statistics: Picturing the World (7th Edition)

Is there a relationship between wine consumption and deaths from heart disease? The table gives data from 19 de...

College Algebra Essentials (5th Edition)

For each hour of class time, how many hours outside of class are recommended for studying and doing homework?

Elementary Algebra For College Students (10th Edition)

Students in a Listening Responses class bought 40 tickets for a piano concert. The number of tickets purchased ...

Elementary and Intermediate Algebra: Concepts and Applications (7th Edition)

For Problems 23-28, write in simpler form, as in Example 4. logbFG

Finite Mathematics for Business, Economics, Life Sciences and Social Sciences

Length of a Guy Wire A communications tower is located at the top of a steep hill, as shown. The angle of incli...

Precalculus: Mathematics for Calculus (Standalone Book)

Knowledge Booster
Background pattern image
Math
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Elementary Geometry for College Students
Geometry
ISBN:9781285195698
Author:Daniel C. Alexander, Geralyn M. Koeberlein
Publisher:Cengage Learning
Text book image
Elementary Geometry For College Students, 7e
Geometry
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Cengage,
Text book image
Algebra: Structure And Method, Book 1
Algebra
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:McDougal Littell
Text book image
Mathematics For Machine Technology
Advanced Math
ISBN:9781337798310
Author:Peterson, John.
Publisher:Cengage Learning,
Text book image
College Algebra (MindTap Course List)
Algebra
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning
Text book image
Trigonometry (MindTap Course List)
Trigonometry
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Cengage Learning
SEE MORE TEXTBOOKS
Use of ALGEBRA in REAL LIFE; Author: Fast and Easy Maths !;https://www.youtube.com/watch?v=9_PbWFpvkDc;License: Standard YouTube License, CC-BY
Compound Interest Formula Explained, Investment, Monthly & Continuously, Word Problems, Algebra; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=P182Abv3fOk;License: Standard YouTube License, CC-BY
Applications of Algebra (Digit, Age, Work, Clock, Mixture and Rate Problems); Author: EngineerProf PH;https://www.youtube.com/watch?v=Y8aJ_wYCS2g;License: Standard YouTube License, CC-BY