Find the diameter of a sphere knowing only the volume. (the volume is 1436.755m^3)

(hurry! ) which expression is equivalent to the following complex fraction?

Answer this 30 points and brainliest!

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?