Part A martin noticed that he had spent $100 on a new bike and deposited $100 that he had earned from selling books to a used bookstore. Which integer represents the change in Martins savings? A. 100
B. 0
C.-100
D. -200
Part B what if he instead deposited $250 that he had earned from selling books to a used bookstore. What will be the amount left in Martins saving now, after he had spend $100 on the bike?

Pleasse me i need an answer. give me the correct answer. answer if you know it ! the club will base its decision about whether to increase the budget for the indoor rock climbing facility on the analysis of its usage. the decision to increase the budget will depend on whether members are using the indoor facility at least two times a week. use the best measure of center for both data sets to determine whether the club should increase the budget. assume there are four weeks in a month. if you think the data is inconclusive, explain why.