You can use the equation dx+3^8+x+23+y6+3^2 to find the expanded form is
4.02 x 100,000
The Invention of Farming lead to the creation of river valley civilizations by making it so the civilization could live in these places and have food. The basic concept of river valley farming is that when the river tide goes up, then the soil becomes very fertile and you plant the crops.
Answer:
I believe it was malaria, but correct me if I'm wrong.
Explanation:
The control of malaria was essential for the construction of the Panama Canal. The discovery that malaria was transmitted by mosquitoes had an immense impact on development programs in the tropics.