Radio waves are electromagnetic waves and as such travel at the speed of light. Waves emitted a century ago would be 100 hundred light years away. A light year is the distance light travels in one year. In one year light travels about 5.9 trillion miles. therefore the waves traveled about 590 trillion miles in a century.
Answer:
a slowdown in growth due to an inability to achieve continuous improvements in competitiveness and productivity;
the poor quality of education and the slow transfer of knowledge and innovative ideas; and.
excessive inequality and lack of social protection.
Explanation:
It's becasue human populations are concentrated in areas that are lacking proper resources.
The correct answer is “D”
A day where people celebrare the people who have died, preferably in latin countries
