Find the present value PV of the given investment (in dollars). (Round your answer to the nearest cent.) PV = $ An investment earns 6% per year and is worth $50,000 after 3 years.

The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of radioactive actinium will remain after 19 years?

Round each percentage increase or decrease that you calculate to the nearest tenth of a percent. Percentage ChangeAn investment declines in value by 2 each month. By what percentage does its value declines in a year?