Joe was looking through a numeric puzzle book and found the following puzzle. The sum of two numbers is two. The difference of the two numbers is also two. What are the two numbers?​

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

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.

Math it's appreciated. (picture provided)