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1)a number of two digits is such that the digits is 11 and the number is 27 greater than the number obtained by reversing the digits. a)Find the number
b)State the advantages of the mean as an average

2) use logarithm tables to evaluate to five significant figures
(23,9*78.619/square root of 0.057381)2

  • math -

    10^ 2(log23.9 + log78.619 - 1/2 log0.057381)
    = 61,529,400

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