Math To: Reiny

This is one whole question:
(12) (10xy^3) (3x^2y^2) (5x) (2y)

I don't know how to do any of these:
simplify sqaure root of 160000
simplify sqaure root of 0.04
simplify 3 * square root 81
simplify square root of 900
simplify square root of 0.0025

simplify [(a^2bc^4)(ab^3c^2)]^2
___________________
(b^2c^5)^3

what is 4^-5/2 expressed as a radical with positive exponents

asked by Maya
  1. (12) (10xy^3) (3x^2y^2) (5x) (2y)
    = mmmmh
    = 3600 x^3 y^6

    For the next 4, I showed you how to do these.
    Did you read my reply?


    [(a^2bc^4)(ab^3c^2)]^2 / (b^2c^5)^3
    = [a^3 b^4 c^6]^2 / (b^6 c^15)
    = (a^6 b^8 c^12) / (b^6 c^15)
    = a^6 b^2 / c^3

    posted by Reiny
  2. for this one:
    12) (10xy^3) (3x^2y^2) (5x) (2y)

    I got (12) 18x^2 3y^5

    and do you know what 4^-5/2 expressed as a radical with positive exponents would be, I did read your reply but I keep getting those questions wrong so can you please show me how to do them

    posted by Maya
  3. for the 4^-5/2 I got 1/ 2* square root of 4^5

    posted by Maya
  4. <<<for this one:
    12) (10xy^3) (3x^2y^2) (5x) (2y)

    I got (12) 18x^2 3y^5 >>>

    By whatever means can you get that ???
    (btw, I did this one for you , look about 20 line up)

    let me rearrange the factors for you ...

    (12)(10)(3)(5)(2) (x)( x^2)( x)( y^3)( y^2)( y)
    = 3600 x^4 y^6 , looks like I missed one of the x's in my first solution

    posted by Reiny
  5. I thought you would add the x and y's ? And can you please help me with these: I begging you!!!! I've tried so much and can't do it!!!

    simplify sqaure root of 160000
    simplify sqaure root of 0.04
    simplify 3 * square root 81
    simplify square root of 900
    simplify square root of 0.0025

    posted by Maya
  6. in 4^-5/2

    is it the way you typed it, or is it 4^(-5/2)

    I have a feeling it is 4^(-5/2)
    = (1/4)^(5/2)
    = [ (1/4)^(1/2) ]^5
    = √(1/4)^5
    = (1/2)^5
    = 1/32

    test it with your calculator

    posted by Reiny
  7. its to the power of -5/2 and I'm supposed to put it in a radicand so I think im right? and please help me with my other questions!!! I have tried so much

    posted by Maya
  8. simplify sqaure root of 160000 = 400
    simplify sqaure root of 0.04 = .2
    simplify 3 * square root 81 = I did this one
    simplify square root of 900 = 30
    simplify square root of 0.0025 =.05
    --- all these could have simply been obtained by pushing the buttons on a calculator

    Your 4^(-5/2) ....
    I also did this for you, look about 5 or 6 lines up.

    Again you could verify my answer on a calculator.
    enter:
    4
    yx
    2.5
    +/-
    =
    to get .03125 which is 1/32, my answer

    posted by Reiny
  9. I cant do it this way, I have to do it this way: for exaple: square root of 50=
    5*square root of 2.

    posted by Maya
  10. Ok, one more shot at explaining it ...

    4^(-5/2)
    = (4^(1/2) )^-5
    = √4 ^-5
    = 2^-5
    = 1/2^5
    = 1/32 , as before

    posted by Reiny
  11. no im talking about the simplifying questions, I have to do it this way
    for exaple: square root of 50=
    5*square root of 2.


    cant just write a number down.

    posted by Maya
  12. Nevermind, Thank you for all your help, and I am just going to write the numbers. Thanks so much :)

    posted by Maya

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