Explain why an earthquake warning system is useful even though earthquakes can not be predicted.

The further people are from the earthquake source, the more warning time they will have, as the waves will take longer to reach them

Explanation:

Fatal accidents during an earthquake can happen in the matter of seconds. Sometimes, rooftops can fall on top of the victims' head. An explosion could occur from leaked gas, etc.

Even if earthquakes can't be predicted, having that additional seconds from the warning can be all it takes for a person to get out from their house and go to some place safe.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.

during the nancy. probs