The answer is either B or D. Letter A doesn't make sense and letter C isn't right either because you need rainfall to have fertile plains.
If the coast-to-coast distance is about 2900 miles, it will take about ...
... (2900 mi)/(186000 mi/s) ≈ 15.6 ms
for the signal to travel coast-to-coast at light speed.
_____
There are time delays due to the amplifiers and repeaters required in the path, and due to the fact that the signals don't actually travel at the speed of light in a wire.
A test of internet speed between Seattle and Washington, DC shows a round-trip time of about 87 ms when traffic is light. Modern communication channels tend to be faster than the telegraph (especially when measured in words per minute).
Answer:
Hay diferentes componentes del espacio geográfico: naturales, sociales, políticos, económicos, culturales.
Explanation:
COMPONENTES NATURALES son todas aquellas características creadas por la naturaleza como los ríos, mares, montañas, lagos, lagunas, etc.
Answer: b/c it increased the production of books
Explanation:
-less tedious work
-saves time and money
