Abiased sample is one in which every member of the group has an equal chance of being chosen. true or false?

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?

Asphere has a diameter of 10 in. what is the volume of the sphere?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be