1. Today: Class Announcements 1.5 Notes Group Problem Solving Begin Homework Return Quizzes

2. 1.5 Problem Solving Using Algebraic Models Objectives: 1. Apply a problem solving plan in real life 2. Use unit analysis to convert units Vocabulary: unit analysis

3. Key Formulas: d = rt d = distance, r = rate, t = time Vocabulary: unit analysis – technique that allows us to convert from one unit system to another.

4. Using Unit Analysis 1. Determine what unit you are given and the unit you are seeking 2. Begin with the unit you are given in the top-left box 3. Cancel the unit by putting it in the denominator 4. Continue this process until you have your desired unit 15 feet = ? inches 84 inches = ? yards 1.5 hours = ? seconds 7 miles/hour = ? feet/second

5. In 1995, the Concorde flew 35,035 miles from New York City to New York City in 31 hours and 27 minutes. What was the average speed?

6. If the Concorde flies at a rate of 1,114 mph, how long will it take to fly 3,469 miles from New York to London?

7. › May pick your own groups  No more than four people in a group › Volume must stay down › Stay on task › Worksheet will be collected at the end of the class period

8. A shower head advertises a maximum flow rate of 2.5 gallons per minute. Find the flow rate if it fills a 22 gallon bathtub in 9.5 minutes. Is this within the advertised limits?

9. The land speed record was broken in 1997 by a British car called the Thrust SSC. It traveled at a rate of 763 miles per hour. This was accomplished by using a jet engine. How long would it take the Thrust SSC to travel 100 miles?

10. You just added a family room to your home. You have budgeted $450 for carpeting. If you need 30 square yards of carpeting, how much can you spend per square yard?

11. You need to do an experiment at home for science and write a lab report on your findings. The experiment involves trials that take 5 minutes each to perform. You want to watch the Fighting Illini basketball game that starts in 1.5 hours. If it takes about 30 minutes to write the lab report, how many trials can you perform before the game starts?

12. A salesman’s salary is $18,500 per year. In addition, the salesman earns 5% commission on the year’s sales. Last year the salesman earned $25,000. How much was sold that year?

13. You want to wallpaper a room that will require 320 square feet of wallpaper. The paper you selected cost $21.99 per roll. Each roll will cover 40 square feet. How much will your project cost?

14. The table gives the heights from the floor to the first few steps of a flight of stairs. Determine the height of the 14 th step. StepLanding123 Height (in)4122028

15. 1.5 pg. 38 #18, 20-23, 41, 42 Chapter 1 Test on Friday, September 7 th