Question

According to science, Earth is about 4.5 billion years old and written human history extends back about 10,000 years. Suppose you represent the entire history of Earth with a 100-meter-long timeline, with the birth of Earth on one end and today at the other end. What distance represents 4 billion years? How far from the end of the timeline does written human history begin?

Answer 1

It begins in 30000 bc

Answer 2

Answer:

4 billion years- 88,88 meters

10,000 years- 2,22*10^-7 meters

Step-by-step explanation:

In order to calculate this you just have to do a rule of three, when 4.5 billlion is 100 meters, and we just have to calculate how many meters are 4 billion and 10,000 meters:

$\frac{4,5}{100} =\frac{4}{x}\\ x=\frac{400}{4,5}\\ x=88,88 meters$

Now, 4.5 billions are in stadar form: 45,000,000,000 so we will use this to calculate with the rule of three of 10,000 years:

$\frac{45,000,000,000}{100} =\frac{10,000}{x}\\ x=\frac{1,000}{45,000,000,000}\\ x=2,22*10^-7 meters$

So those two would be the answers.