Ethan can travel (##) miles (more or less) than Taylor on one gallon of gas

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

Landon wrote that 3−2.6=4. which statement about his answer is true?

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i