kevinsaravia76 kevinsaravia76 17-05-2020 Mathematics contestada Which function models this variation: a varies directly with b and inversely with c, and when b=10 and c=20, a=14. Using your function, what is the value of a when b=18 and c=9 ? A. a=b2c;a=1 B. a=b2c;a=2 C. a=2bc;a=1 D. a=2bc;a=2