How do you do 2 to the one third power

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?

How can (square root of 25) ^2 be rewritten?

What function has a range {yly< 5}? question on picture above^