What is the opportunity cost of a city builds an office building instead of a park

The constitution protects the rights of citizens by limiting the power of government

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a.seismic waves kill microoganisms b.seismic waves disrupts the sand and causes seafloor erosion c.seismic waves have virtually no adverse affects on marine life d.seismic waves damage the sonar that dolphins and whales use to orient themselves underwater

How did the united states obtained the purchase of floridia to extand its frontiers to the pacific ocean