Find the sum of the first 12 terms.

An=3-8n

need a solution

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.

Write the rational number in lowest terms 99/-15

[tex]5 \times1 \frac{12}{13} [/tex] me