Archanged 11. A chemist dissolves 0.400 mol benzene in 800 grams of Substance X, then finds the boiling point of Substance X has increased by 1.4°C. What is the molal boiling point elevation constant (K)
for Substance ?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 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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Which of the following graphs could represent a cubic function?