I need help asap :-) 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

Which of the following is the shape of a cross section of the figure shown below

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?