Plz plz help fast no trolls plz thx​

2÷6+1/2 to the second power plus one

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?

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?