You drop the rubber ball from height h. it bounces back to 60% of its original height. write an equation you can use to find the height h.

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?