Which model of the solar system best supports retrograde motion of the planets?

a. ptolemy's model

b. the geocentric model

c. the heliocentric model

d. an earth-centered model

This is really important 1.which of the following prefixes represents the largest value? (2 points)gigahectorkilomilli2.which of the following types of graphs is best for plotting the mean, median, and mode of data? (2 points)bar graphbox-and-whiskercircle graphstem-and-leaf