Here are the answers to your questions:
Question 1 A) What do you ask about if you want to know the price of an item?
Response: el precio
Question 2 A) Which of the following is more than novecientos?
Response: mil
Question 3 A) How would you say in Spanish, "The coat and the boots cost two hundred dollars."
Response: El abrigo y las botas cuestan doscientos dólares.
Question 4 A) Which was the first known civilization to use the concept of zero?
Response: Maya
Question 5 A) What is a huipil?
Response: blouse
Let me know if you need further assistance!