In 1838, the city of Boston established the first American police force, followed by New York City in 1845, Albany, NY and Chicago in 1851, New Orleans and Cincinnati in 1853, Philadelphia in 1855, and Newark, NJ and Baltimore in 1857 (Harring 1983, Lundman 1980; Lynch 1984).
<h2>Answer: Atoll</h2>
An atoll is an oceanic coral island, usually in the shape of a circular ring, which may be completely or partially closed. It is also called by this term to the set of several small islands that are part of a coral reef, with an interior lagoon that generally communicates with the sea.
Atolls are formed when a coral reef grows around an oceanic volcanic island, as the island sinks into the ocean and disappears underwater, the growth of the coral increases until reaching the sea level, where the action of the wind and the waves erode it and transform it into sand.
It should be noted that this process can take millions of years.
In this sense, the Maldives, an island country located in the Indian Ocean (southwest of Sri Lanka and a few kilometers from India), has these characteristics.
Its territory is organized in 26 atolls and as a country it is constituted by some 1200 islands.
I’m pretty sure it’s the 2nd one :)
The correct answer is D. ocean floor mapping and earthquake tracking
Tracking earthquakes is helpful because it shows where it came from and what caused it, as well as how it affected the environment, while ocean floor mapping is useful because it shows how the bottom of the sea changed over time which happens due to tectonic activity.
if two doscounts x and y are given, then
total discount= (x+y-xy/100)%
by the question,
x=20%
y=75%
hence total discount= (20+75-20×75/100)%
=(95-1500/100)%
=(95-15)%
=80%
