Find the value of X - triangle measurments

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?

Adeposit of 5500 at 6% for 3 years equals

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge