en el número de estudiantes con faringitis estreptocócica en Benton High se duplica cada semana durante el semestre otoño sí 5 personas estuvieron enfermas al principio Cuál de las siguientes ecuaciones representa el número de las siguientes que contrajeron fanjiritis estrófica después de X semana

I'll give brainliest if you answer right : )

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)

What is the solution to the equation e3x=12? round your answer to the nearest hundredth