## Thursday, October 28, 2010

### SCRIBE 1

SHOW YOU KNOW (page 82)
Write the prime factorization of each number. Which number is not a perfect square?
Explain how you know.

PRIME FACTORIZATION- a number written as the product of its prime factors.

45 is not a perfect square because it has an odd number of factors of 3 and 5.

TEXTBOOK QUESTIONS 1, 5, 10, and 16. (page 85 and 86)

1. Explain how to square the number 7.
To square number 7, multiply it to itself. Then you'll get 49.
7 x 7 = 49.

5. a) Determine the prime factorization of 4.
b) Is 4 a perfect square? Explain.
c) Draw the square and label it's side length.

a.)

b.)Yes, 2 appeared two times. If you multiply 2 to itself, you'll get 4.
c.)

10. Determine the area of a square with each side length.
a) 20
b) 17

a) 20 cm x 20 cm = 400 square units
b) 17 cm x 17 cm = 289 square units

15. EVALUATE.
a.) `square root 9
b.) `square root 25
c.) `square root 1600

a.) The square root of 9 is 3.
3 x 3 = 9 / 3 multiply by itself, you'll get 9.

b.) The square root of 25 is 5.
5 x 5 = 25 / 5 multiply by itself, you'll get 25.

c.) the square root of 1600 is 40.
40 x 40 = 1600 / 40 multiply by itself, you'll get 1600.

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