code: def frexp10(x):
      
      expon = _np.int(_np.floor(_np.log10(_np.abs(x))))
      mant = x/_np.power(10, expon)
      return (mant, expon)
docs: Finds the mantissa and exponent of a number :math:`x` such that :math:`x = m 10^e`.
  
      Parameters
      ----------
  
      x : float
          Number :math:`x` such that :math:`x = m 10^e`.
  
      Returns
      -------
  
      mantissa : float
          Number :math:`m` such that :math:`x = m 10^e`.
      exponent : float
          Number :math:`e` such that :math:`x = m 10^e`.