1) The document provides homework assignments for Lesson 7.3 from a textbook. It includes solving expressions using scientific notation, multiplying and dividing numbers in scientific notation, and expressing numbers between standard and scientific notation. 2) Students are to complete practice problems from sections 3-51 and 3-45 from Lesson 7.3 in the textbook, which are due on Monday. 3) It also asks if a chapter 6 test was signed for extra credit.

1. Assignment:
1­­>L7.3, pg. 419­420, #3­51 (3rds) ­ Due Monday (2/13)
2­­>L7.4, pg. 426­427, #3­45 (3rds) ­ Due Monday (2/13)
3­­>Chapter 6 Test signed for extra credit?
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2. Lesson 7.3 WarmUp:
Simplify each expression.
1) (­xy)3(xz)
2) ­3(2x)4(4x5y)2
3) (­3a3b4)(­3a3b)4
4) (a2b3)2
(ab)­2
5)
[ 2x3y2z
3x4yz­2
[ ­2
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3. Lesson 7.3:
*scientific notation ­ a number written in the form: a x 10n,
where 1 < a < 10
**To multiply numbers in scientific notation...
­­multiply the coefficients ­ add the exponents
**To divide numbers in scientific notation...
­­divide the coefficients ­ subtract the exponents
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4. Lesson 7.3 examples:
Express each number in scientific notation.
A) 185,000,000
B) 0.0000564
Express each number in standard form.
C) 1.98 x 107
D) 6.83 x 10­5
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5. Evaluate each product.
E) (1.2 x 103)(1.45 x 1012)
F) (2.9 x 10­2)(5.2 x 10­9)
Evaluate each quotient.
G) 2.542 x 105
4.1 x 10­10
H) 1.445 x 10­7
1.7 x 105
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