What is the answer of if we multiply zero by iota?

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)

Which of the following is the graph of y= square root -x-3

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?