To build a road, a company charges a flat fee plus a fee that varies depending on the number of kilometers of road built. The cost of the work is described by a graph that passes through points (0, 2) and (12, 7), in millions of reais, depending on the number of kilometers built. Therefore, determine the law that represents this function.

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)

A. what is the area of the base? use complete sentences to explain your reasoning. b. what is the volume of the prism? use complete sentences to explain your reasoning.

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