Which situation could be modeled by using a linear function ?
1) a bank account balance that grows at a rate of 5% per year compounded annually
2) a population of bacteria that doubles every 4.5 hours
3) the cost of the cell phone service that charges a base amount plus 20 cents per minute
3) the concentration of medicine in a persons body that decays by a factor of one- third every hour

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave

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?