input: from typing import List
  
  def square_root(numbers: List[float]) -> List[float]:
      """ Calculate the square root of a list of positive numbers.
      >>> square_root([100, 64, 49])
      [10.0, 8.0, 7.0]
      >>> square_root([144, 225, 169])
      [12.0, 15.0, 13.0]
      """
output:     return [num ** 0.5 for num in numbers]