Chloe's car used 2/3 of a gallon to travel 12 1/2 miles. At what rate does the car use gas, in miles per gallon?

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?