The admission fee for an amusement park is $15 for adults and $7.50 for children. one weekend, 4502 people paid admission for the amusement park, and the park made $52,515. how many adults and how many children paid to go to the amusement park that weekend?

a. a • c = 4502

15a • 7.5c = 52,515

b. a + c = 22.5

15a + 7.5c = 57,017

c. a + c = 4502

15a + 7.5c = 52,515

d. a + c = 52,515

15a + 7.5c = 4502