Triangle abc is a scaled copy of triangle def with what scale factor?

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.

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.