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February 28, 2015

February 28, 2015

Posted by **Dave** on Monday, February 4, 2013 at 5:41pm.

Always, never , or sometimes.

7. Evaluate 1/2a^-4b^2 a = -2 and b = 4.

6. Simplify. Write in scientific notation. (9 x 10^-3)^2

Thanks to anyone who helps right away and need right answer from the people who have already taken this test.

- Algebra 1 -
**Reiny**, Monday, February 4, 2013 at 6:20pm8.

4^-3 = 1/4^3 = 1/64

(-2)^-3 = 1/(-2)^3 = 1/-8

7 , the way you typed it ...

(1/2)a^-4 b^2

= (1/2)(1/(-2)^4 (4)^2

= (1/2)(1/16)(16) = 1/2

6. (9 x 10^-3)^2 = 1.8 x 10^-6

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