Consider the first six terms of this sequence: 6,12,24,48,96, Which equation below recursively defines the sequence? Pls answer quickly

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

The anwser cause i do not understand just plez