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

8.A number raised to a negative exponent is negative.

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.

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