Part A What is the explicit formula for the sequence 10, 15, 22.5, 33.75, …? A.an=10(1.5)n−1 B.an=10(12)n 1 C.an=1.5(an−1);a1=10 D.an=12(an 1);a1=10 Part B What is the recursive formula for the sequence 10, 15, 22.5, 33.75, …? A.an=10(1.5)n−1 B.an=10(12)n 1 C.an=1.5(an−1);a1=10 D.an=12(an 1);a1=10