I need help with this question, plz.

Given a circle with measures of (c, d, and r) and a circle with measures of (c', d', and r'), what is d if c c' = 12 and d' = 0.50? a) 3 b) 6 c) 12 d) 24

Guys i really need or i have to stay late up night

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis