Ptolemy, an early greek astronomer, thought the orbits of the planets were circular no definite shape ovals elliptical

Ptolemy, an early Greek astronomer, thought the orbits of the planets were circular.

Explanation:

According to Ptolemy, planets are supposed to move in a small circle called an epicycle that, in turn, moves along a larger circle called deferent. Both circles rotate in a clockwise direction and are more or less parallel to the plane of the Sun's orbit. Although the system was considered geocentric, the movement of the planets was not centered on the Earth but on what is called the eccentric. The orbits of the planets in this system describe epitrocoid curves.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

part a. there were 250 teenagers surveyed (100% of tenagers = 250)therefore 1 % = 250/100 = 2.5 76% = 1% x 76 = 2.5 x 76 = 190 teenagers of the 250 surveyed liked burgerspart b: jane surveyed 25% (which is equal to 50 teenagers, i.e. a quarter of the teenagers surveyed is 50) to get 100% we simply get 4 quarters, i.e. multiply 50 by 4 = 200 teenagers were surveyed by jane. part c: it is impossible to give an example where a percentage is greater than 100%, since, by definition , percentage means "per 100".