There are 35 students in art class and 57 students in dance class. find the number of students who are either in art class or in dance class.
when two classes meet at different hours and 12 students are enrolled in both activities
when two classes meet at the same hour

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)

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer