Write the following in expanded notation : 8,325 how would you explain this to a friend?

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

How to simply and write the answer n a whole number