Ruben said that 96.52 ÷ 12.7 equals 7.6. is ruben's answer reasonable? a. no, ruben's answer should be closer to 0.8. b. no, ruben's answer should be closer to 80. c. no, ruben's answer should be closer to 800. d. yes, ruben's answer is reasonable.

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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)

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