12 1/2, 12.09, 12 2/5, 12.8 list from fastest to slowest

Which choice represents the sample space ,s for this event

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

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: