6friends share 3 fruit bars equally

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Select the quadratic that has root x = 8 and x = -5

What are two numbers that have a sum of 15?