Answer:
Is this a multiple choice?
Step-by-step explanation:
Answer: It depends on what categories your teacher has and what percent of your grade it is worth. I would recommend an online grade calculator
You're starting at 400. Each time you're cutting in half.
So the common ratio is 1/2 which means the equation is

which is in the geometric sequence format. So the answer is choice D
Step-by-step explanation:
815..............…......…
The answer is gonna be C,which is 91.Hope this helps