What is the probability of selecting a Queen in a deck of cards, replacing the card, then selecting a 9 from the same deck of cards, replacing the card again, then selecting an Ace. Hint: There are four of each type of card in a deck of cards. There are 52 cards total in the deck. Show your work and leave your answer as a fraction. P(Queen, 9, Ace) = ?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as