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March 30, 2017

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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.

  • Algebra 1 - ,

    8.
    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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