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Math

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HELP?!
1.-9^2
2.(5x^9y)(-2x^-2y^-3)
3.(a^1b^-2) / (a^-2b^4)
4.(7x^-1/y^4)^-2
Scientific notation:
5)
.0000745
Decimal Form:
6)
9.3*10^6

Solve:
7.3√-27

8.√(-5a)^2
Simplify:

9.√60x^5y^2

10.√75x^3 / √3x

  • Math - ,

    1. -9^2 = -(9^2) = -81
    2. -10 x^7 y^-2
    3. a^3 b^-6
    4. (7 x^-1 y^-4)^-2 = 1/49 x^2 y^8
    5. 7.45*10^-5
    6. 9,300,000
    7. 3√-27 = 3√9√3 i = 9√3 i
    8. √(25a^2) = 5a (note the "-" sign gets lost)
    9. 2 x^2 y √15x
    10. 5x

    As usual, check my math. If something's not clear, come on back.

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