Paula is collecting money for charity. Her goal for this week is to collect a minimum of 45 dollars. So far this week, she has already collected 20 dollars. Which inequality could be used to determine the mean number of dollars, d, she would need to collect each day for 4 more days to achieve her goal? a. 4m + 20 ≥ 45

b. 4m + 20 > 45

c. 4m – 20 ≥ 45

d. 4m + 20 ≤ 45