2. A mobula ray is 3 meters above the surface of the ocean. How does its vertical position
compare to the height or depth of:
The jumping dolphin?
The flying seagull?
The octopus?

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?