How many six-letter "words" (sequences of letters with repetition) are there in which the first and last letter are vowels? in which vowels appear only (if at all) as the first and last letter? comment on these possible answers to the second part: (a) 52214, (b) 52264, (c) 212264, and (d) 266 − 212264

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)

How far does the wijw nj jh jevh dhhb vte hbhe gvbf5wf bjehn v

Convert 3,200,000 to a scientific notation.