Simplify -2.8f+0.9f-12-4

Chose the graph below that represents the following system of inequality’s

What is the solution to the equation 9^(x+1) =27

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.