A pool was filled with 8.2*10^-3 gallons from one and 9.4*10^3 gallons another hose what is the total amount of water in the pool? Express the answer in scientific notation

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?