PLEASE HELP ME and give your reasoning!!

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?

Binh says the point of intersections is (0,-3) which statements identify the errors binh made , check all that apply

When you find the area of a triangle do you use in. or in2