Answer:
Uncertain - 99%.
Explanation:
Predicting or forecasting the future could be measured with a sense of certainty or uncertainty. If a person sees dark clouds on the sky, they would be more certain than uncertain that it's an omen of rain. If you are collecting relevant data and then apply it to a forecast having less than 1% of certainty of reducing the degree of risk, conditions are uncertain. And, if measured from 1% to 100%, substracting that 1% of certainty leaves a 99& of uncertainty.
<span>silk and cotton textiles, porcelain, spices, precious metals and gems, slaves, exotic animals</span>
The Wright brothers flew their first plane in 1903 and the first continental railroad opened in 1869 if you subtract those two you would get 34 years after
