What is the recursive rule for this geometric sequence? 500, 100, 20, 4, ...

a1=2500; an=−5an−1

a1=500; an=−5an−1

a1=500; an=1/5an−1

a1=2500; an=1/5an−1

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.

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

If the discriminant if a quadratic equation is 4 which statement describes the roots?