I'm not sure what this means, I need major help

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!