Find the selling price of each item using the method of your choice. You must show your work 3) cost of a CD: $13.50 markup: 87%. 4) cost of a book: $74.50 markup:50%

Answer this question! 30 points and brainliest! only if you know the answer.

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?