What is the rate of change

Asequence of numbers begins with 12 and progresses geometrically. each number is the previous number divided by 2. which value can be used as the common ratio in an explicit formula that represents the sequence? 1/2 2 6 12

Evaluate the expression. (9 + 5)(3 + 2)0

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect