The sun is behind a building and casting a shadow. how long is the shadow if the building is 25 feet tall and the angle, of the shadow, opposite the building is 27°?

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?