Please please please help!! it’s geometry, it’s only one question

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Ten times the square of a non-zero number is eqaul to ninety times the 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: