Does anyone know how to solve this?

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

For what type of equity loan are you lent a lump sum, which is to be paid within a certain period of time? a. a line of credit b. equity c. a second mortgage d. an amortization

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?