Nis prime given that it has 2 digits

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?