1. Pick up and Do worksheet 8.2 (1-24)
Bellwork
Pick up and Do worksheet 8.2 (1-24)

2. Exponent Rules 1.) am • an = 2.) (am)n = 3.) (a • b)m 4.) a-n =
3.) am • bm
4.) 1/an
5.) 1

3. Exponent Rules
6.) am an
7.) a n b
6.) am-n
7.) an bn

4. Worksheet 8.1
On a sheet of paper, number from 1-18.
Take the Quiz on page 425 (1-18)
You can use your rules (1-7) sheet.

5. It is on the back of worksheet 8.2
Bellwork
Do worksheet 8.3 (1-20 only)
It is on the back of worksheet 8.2

6. Bellwork Simplify 1.) 6x-1y2 7xy-3 2y3 x2 2.) 8x2y3 -2x-2y -4x-1y-3 -x
3.) -5x2y3 (2xy) x3y x-2y2

7. Bellwork Simplify
1.) 6x-1y2 7xy y x2
42y x2y3
x2y4

8. Bellwork Simplify
2.) 8x2y x-2y x-1y x
-16y y-3
-4y7

9. Bellwork Simplify 3.) -5x2y3 (2xy)-1 x2y3 -6x-2y2

10. Quiz
Take the Quiz over

11. Today’s Objective
To be able to express a very large number or very small number in scientific notation.

12. Scientific Notation What does the sun weigh?
4,400,000,000,000,000,000,000,000,000,000 lbs.
How much hydrogen does the sun burn each second?
600,000,000 metric tons

13. Scientific Notation How much longer will the sun burn?
6,000,000,000 years.

14. Scientific Notation 600,000,000 metric tons 6,000,000,000 years
Let’s look at these large Numbers
4,400,000,000,000,000,000,000,000,000,000 lbs.
600,000,000 metric tons
6,000,000,000 years
Each of these numbers can be written in a different form called Scientific Notation

15. Scientific Notation Scientific Notation is made up of 2 parts.
1st Part = a number between 1 and 10
2nd Part = x 10 to some power
If it doesn’t have both parts, it is NOT Scientific Notation.

16. Scientific Notation 4.4 x 1030 lbs.
Let’s change these large Numbers to Scientific Notation…..
4,400,000,000,000,000,000,000,000,000,000 lbs.
4.4 x 1030 lbs.
Place the decimal pt. after the first # and then count to the end.

17. Scientific Notation 600,000,000 metric tons 6.0 x 10?
6.0 x 108 metric tons
6,000,000,000 years
6.0 x 109 years

18. Change to Scientific Notation
1570
Place the decimal just after the first number
Then count the # of places 1570
= 1.57 x 103

19. Change to Scientific Notation
832,000,000
Place the decimal just after the first number.
Then count the # of places
=8.32 x 108

20. Change to Scientific Notation
2450 = 2.45 x 103
765,000,000 = 7.65 x 108
= 7.22 x 10-4
Notice that if the decimal moves right the exponent is negative and if it moves left, the decimal is positive.

21. Change to Scientific Notation
Place the decimal just after the first number.
Then count the # of places.
000722
= 7.22 x 10-4

22. Change to Standard Notation
Now let’s go backwards and change from Scientific Notation to Standard Notation.

23. Change to Standard Notation
4.53 x 105
Move the decimal pt. 5 places to the right.
453000
= 453,000

24. Scientific Notation (5 x 103)(4 x 105) 5 x 4 = 20 103 x 105 = 108
Now convert to Scientific Notation
2.0 x 109

25. 8.2 x 108 Try this one Count to the end 820,000,000 8.2
Place the point after the 1st #
Count to the end
8.2 x 108

26. Try this one (6 x 102)(3 x 107) 6 x 3 = 18 102 x 107 = 109 18 x 109
Now convert to Scientific Notation
1.8 x 1010

27. Try this one 2.5 x 107 (5 x 103)2 = (5 x 103) (5 x 103) 5 x 5 = 25

28. Closure
1.) What are the 2 parts that make up Scientific Notation?
2.) How do you determine if the exponent is positive or negative?
3.) When do you use Scientific Notation?

29. Classwork Do worksheet 8.4 Homework page 422 (5-26)
Quiz over Friday

30. List of Clicks
Start, P:\ drive, Algebra, Multichc, Smiley Face, Open, Sec8-4