Tuesday, February 07, 2006

February 07 2006

Today we corrected the "A Little Quiz" quiz.

Sarah insisted that there were errors in the following statements. Scott insisted that the following statements are correct. Who is right and why? Correct each statement that has an error(s).

Here are the correct answers :

1. (x^8)(x^4) = x^32

- this statement is wrong

- (x.x.x.x.x.x.x.x)(x.x.x.x) = x^12
(^eight "x"s and four "x"s equals twelve "x"s)

- it is product law


2. (b^2c^3)(b^3c^2) = b^5c^5

- this statement is correct

- (b.b)(c.c.c) . (b.b.b)(c.c.c) = b^5c^5

- it is product law


3. (a^2b^3)^5 = a^10b^15

- this statement is correct

- (a.a)(a.a)(a.a)(a.a)(a.a)(b.b.b)(b.b.b)(b.b.b) = a^10b^15

- it is power law


4. (-3mq)^2 = -6m^2q^2


- this statement is wrong

- (-3mq)^2 = -3mq x -3mq = 9m^2q^2

- (-3)(-3)(m)(m)(q)(q) = 9mmqq ^^ like shown

- first of all 3x3 is not 6 , the person who made this statement added the two 3's instead of multiplying them. 3x3=9 , and a negative number multiplyed by a negative number equals a positive number, not another negative. But they added the exponents correctly

- it is power law


5. (2k^2g^3)^4 = (4g^6k^4)^2

- this statement is correct

- (2)(2)(2)(2)(k.k)(k.k)(k.k)(k.k)(k.k)(g.g.g)(g.g.g)(g.g.g)(g.g.g) = 16k^7g^12
(4)(4)(g.g.g.g.g.g)(g.g.g.g.g.g)(k.k.k.k)(k.k.k.k) = 16k^7g^12

- it is power law


6. (3a^5b^6c)^2 = 3a^7b^8c^3

- this statement is wrong

- (3a^5b^6c)^2 = (3)(3)(a.a.a.a.a)(a.a.a.a.a)(b.b.b.b.b.b.b)(b.b.b.b.b.b)(c)(c) = 9a^10b^12^2

- it is power law


NOTE: all of these statements are "exponent" laws . There were a lot of people who lost marks by putting "exponent law". PRODUCT LAW, QUOTIENT LAW & POWER LAW are all under the catagory "exponent law"

Then we spent the rest of the class correcting (in groups) the "Following the Directions" sheet. The end answer was "Lemons For Sale", but you need to do all the work in between to figure out how that was done ...

WELL TODAY WAS EARLY DISMISSAL SO WE DIDN'T DO MUCH . SEE YOU GUYS TOMOROW



DUE : POWERS AND EXPONENTS UNIT DUE !! HAND THAT IN A.S.A.P. (:

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