Hey! can y’all help with this?

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

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:

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25