In the situation described, determine the INDEPENDENT VARIABLE: The height of a plant and the amount it is watered

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:

Jose is going to use a random number generator 500500 times. each time he uses it, he will get a 1, 2, 3,1,2,3, or 44.

Find the solution(s) to x^2-14+49=0