Answer:
I think no. D (Satellites)
-- The low tides would be lower, and the high tides would be higher.
-- The time from a low tide to a high tide, or from a high tide to a low tide,
would average 6hrs 24min, instead of the present 6hrs 12.2min.
(By the way ... the moon revolves around the Earth in 27.32 days.
That "30 days" that you mentioned is close to the complete cycle
of the moon's phases ... 29.53 days ... which the tides also follow.)
After reviewing the graph you posted above, there is one radioactive isotope that has a half life that is approximate to the same as the estimated time of the origin of Earth.
The radioactive isotope is called Uranium 238. You can also write this out as U-238 or uranium/u. Any of these are acceptable for the answer.
Rivers are very important in the United States economy because they transport goods for trade across the country. This also can transport people via ship, allowing those in the workforce to travel long distances for job opportunities. Rivers are great for agriculture because of the nearby water source and nutrients that the water may carry. They can fuel lumber mills and be used as a port for fishermen.
