Iam a number between 30 and 50 . i am a multiple of 8. my greatest common factor with 25 is 5 what number am i ?

What is the range? can’t seem to find it out

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)

Ineed with the quizzes in apex mathematics ii