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).
I think the correct answer from the choices listed above is option D. The metamorphic rock that would most likely have formed at the highest temperatures and pressures would be phyllite. It <span>is a type of foliated metamorphic rock created from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation. </span>
Schist has the highest metamorphic grade.
The given information is expressed in ratio. However, a ratio is basically a fraction. So, 4:10 is just equal to 4/10 or 2/5 in simplified terms. Similarly, 12:20 is just equal to 12/20 or 6/5 in simplified terms. The smaller ratio is 2/5 because the numerator is less than the denominator. So, it follows that the answer is less than 1. The other ratio has a much greater numerator. So, we would expect that that would be greater than 1.
