The geocentric model was developed during the time of the ancient greeks. this model
a. was abandoned during the time of the roman empire and would never be widely held again.
b. was held to be true by thinkers throughout the middle ages, up until the renaissance.
c. was rediscovered by the polish astronomer copernicus and has been the accepted model of the universe ever since.
d. has been proven by nasa space images.

Option B

Explanation:

The very first recorded case of a geocentric universe originates from around the sixth century BCE. It was during this time Pre-Socratic thinker Anaximander proposed a cosmological framework where a round and hollow Earth was held on high at the focal point of everything.  As per the geocentric model, the Sun, stars, Moon and planets all orbits the Earth. The geocentric model was the overwhelming depiction of the universe in numerous old human advancements, for example, those of Aristotle in Classical Greece and Ptolemy in Roman Egypt.  The geocentric model was inevitably supplanted by the heliocentric model. The most punctual heliocentric model, Copernican heliocentrism, could expel Ptolemy's epicycles in light of the fact that the retrograde movement could be believed to be the consequence of the mix of Earth and planet development and paces.

The figure is not necessarily a parallelogram because only one diagonal is bisected and only one pair of sides is congruent.

343^x = 49^4-xx = 4-xx+x=42x = 4x = 4/2x = 2therefore x = 2