Which scenario models a ratio of 3 to 8 * A. the ratio of shells to rocks if there are 3 rocks and 8 shells
B. the ratio of shoes to dresses if there are 3 shoes and 10 dresses
C. the ratio of sick patients to the total patients if there are 8 sick and 10 healthy patients
D. the ratio of small dogs to big dogs if there are 8 small and 3 big dogs
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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 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)