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Posted by on Tuesday, May 18, 2010 at 10:55pm.

the number of red marbles varies inversely as the square of the number of blue marbles. when there were four reds, there were 20 blues. How many reds would there be if there were only four blues?

  • math - , Tuesday, May 18, 2010 at 10:56pm

    100

  • math - , Wednesday, May 19, 2010 at 12:13am

    r = k/b^2 , r is red, b is blue

    4 = k/400
    k = 1600
    then r = 1600/b^2

    when b = 4
    r = 1600/16
    = 100

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