According to modern 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 by 12 hours on a clock, with the birth of earth at the stroke of midnight and today at the stroke of noon. based on this information, answer the following two questions:
- how much time on the clock represents 500 million years?
- how long before noon does written human history begin?

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !