Help with math please

I’m which figure is point g an orthocenter

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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?