4 x³ + 8x what is the answer​

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?

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5