Find the volume of the sphere to the nearest whole number. use pi = 3.14

Angela rode his bike around a bike trail that was 1/4 of a mile long he rode his bike around the trail 8 * angelo says he wrote a total of 8/4 miles to russell says he's wrong and he actually and says that he actually wrote to my who is corrupt use words and trying to explain how you know.

Which of the following is true for the relation f(x)=2x^2+1

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