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# Spi 4.4 rates and measurements annotated

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### Spi 4.4 rates and measurements annotated

1. 1. Bell Ringer<br />Simplify the following:<br />1. √30 * √60<br />2. √300 * 5√20<br />3. 6√20 + 3√10 – 5√20 – 10√10<br />4. Find the distance AND midpoint of the line segment with the endpoints (-6, -2) and (5, 6).<br />
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6. 6. What are we doing today?<br /> SPI 4.4 Convert rates and measurements.<br />
7. 7. Conversion factors<br />A CONVERSION FACTOR is the number you multiply or divide by to convert from one unit to another.<br />In the metric system, <br />milli- = 1/1,000<br />centi- = 1/100<br />kilo- = 1,000<br />
8. 8. Important Conversion Factors<br />
9. 9. Important Conversion Factors cont.<br />
10. 10. In the metric system,<br />milli- = 1/1,000<br />centi- = 1/100<br />kilo- = 1,000<br />
11. 11. Important Conversion Factors cont.<br />
12. 12. An example of a problem:<br />The mass of an object is 7.45 kg. What is the mass of the object in grams?<br />We’ll use DIMENSIONAL ANALYSIS to solve these problems.<br />
13. 13. The mass of an object is 7.45 kg. What is the mass of the object in grams?<br />
14. 14. Pairs Check<br />Person 1: How many liters of water are in 35 mL?<br />Person 2: How many mL of water are in 2.3 L?<br />
15. 15. Another Pairs Check<br />Person 1: The road between two towns is 2.44 miles long. How long is the road in yards?<br />Person 2: The road between two towns is 5,922 yards long. How long is the road in miles?<br />
16. 16. Another example:<br />A truck is traveling at 55 miles per hour. How many feet per second is the truck traveling?<br />
17. 17. Pairs Check<br />Person 1: A truck is traveling at 90 miles per hour. How many feet per second is the truck traveling?<br />Person 2: A truck is traveling at 20 miles per hour. How many feet per second is the truck traveling?<br />
18. 18. Dimensional Analysis<br />Give the definition in your own words.<br />Give examples.<br />
19. 19. ACTIVITY TIME!<br />
20. 20. U R the Teacher<br />Teacher solves: A living room has 12 yards of carpeting. How many inches of carpeting is this?<br />
21. 21. Assignment<br />Complete worksheet on whiteboard.<br />