1) tim earns $12 per hour as head lifeguard at sammy's swim park. as a first year lifeguard jack earns 30% less than tim, and as a second year lifeguard jim earns $1 more per hour than jack. which expression represents how much jim earns? (h represents hours)

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?