. Andrés va a colocar piso

a su cuarto, si el cuarto mide

3.7m de ancho por 4.5m de

largo y cada caja de piso

alcanza para 1.54m2. ¿Cuántas

cajas de piso va a necesitar?

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)