Algebra 1

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Plz help me with the following problems.


Simplify. 5^-1(3^-2)

Simplify. mn^-4/p^0q^-2

Write a scientific notation. 0.0042

Write in standard notation. 6.12*10^3

Simplify. Write in scientific notation. 0.5(8 * 10^5)

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

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

Simplify (4xy^2)^3(xy)^5

Simplify (2t^-3)^3(0.4r)^2

  • Algebra 1 -

    Actually I only need help with the second problem,and the 7th problem,

    Simplify. mn^-4/p^0q^-2

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

  • Algebra 1 -

    p^0 = 1, so

    mn^-4/p^0q^-2 = (m/n^4) / (1/q^2) = mq^2/n^4

    1/(2 (-2)^-4 (4)^2)
    1/(2 (1/16) (16))
    1/2

    Note that (-2)^4 = (-2)(-2)(-2)(-2) = +16

  • Algebra 1 -

    Thank you Steve~!

  • Algebra 1 -

    1. B. 1/45
    2. A. mq^2/n^4
    3. C. 4.2 x 10^-3
    4. A. 6,120
    5. D. 4 x 10^5
    6. A. 8.1 x 10^-5
    7. B. 1/2
    8. C. Sometimes
    9. A. 64x^8y^11
    10. C. 1.28r^2/t^9

    Heheh :))))

  • Algebra 1 -

    Cuz I'm Cool Is 100% right

  • Algebra 1 -

    Thanks!

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