Write down next two terms in this number pattern: 2,5,9,14,20

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

Each unit cost 14p, how much would 942 units cost?

Atown has a population of 7000 and grows at 3% every year. to the nearest year, how long will it be until the population will reach 12400?