Roman has 2 red pencils in his backpack. if this is 25%of the pencils ,how meny pencils are in his backpack

On a piece of paper graph f(x)=5•(0.4)^x

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.

Will mark brainlist what is the slope of the line passing through the points (-2, -8) and (-3,-9)? -7/5-5/71-1