Answer:
2.84*10^-3 years = 0.00284*10^-3 years
Explanation:
To find the orbital period you use the following formula:

r: 2.0A = 2.0(1.5*10^11m)=3*10^11 m
G: Cavendish constant = 6.67*10^-11 Nm^2/kg^2
M: mass of the sun = 1.98*10^30 kg

Next, you calculate the time in seconds of one Earth's year:

thus, you use this value to find the orbital period of the asteroid in Earth's year:

Answer:
D. The Byzantine Empire recovered from the 1204 attack.
Explanation:
During the attack in 1204, part of Constantinople's capital city was destroyed by the Ottoman. But in the end, the Byzantine empire still managed to drive the ottoman out of important territories. That being said, Byzantine Empire still lost quite a few of their outer territories to the Ottoman.
The attack in 1453 on the other hand occurred after the Byzantine empire experienced the black plague that killed large portion of their population. This made their military became really week. In the end, the attack in 1453 marked the fall of Byzantine empire.
Social Darwinism was most likely applied to treat immigrants from different regions differently, however, Social Darwinism does not specifically relate to immigrants but also to all members of society. In the American context, the notion was implemented to popularize the notion of "survival of the fittest" or that the strongest members of a society will succeed and the political system should support this theory.