What is the scale factor of this dilation??? PLZ

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

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?

Twice the sum of a number and 2 is equal to three times the difference of the number and 8. find the number.