If you substract 1/2 from a number and multiply 1/2 from the result you get 1/8 . what is the number

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.

If you are just building your payment history, how many points from a perfect score will you possibly miss?

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3