The [color=#000000][i]half-life[/i] of a substance[/color] is the [color=#000000]time it takes for half of the initial amount of that substance to decay. [/color][br][br]This interactive figure is designed to help you check your solutions to problems that prompt you to calculate the time it takes for a certain substance (with known initial amount) to decay to a smaller amount.[br][br]First, solve such a given problem mathematically on your own. Then use this interactive figure to check. To check, simply do the following: [br][list=1][*]Enter the [color=#9900ff]initial amount[/color] of the substance. [br][/*][*]Enter the [color=#0000ff]half-life[/color] of a substance. [br][/*][*]Enter the [color=#980000]amount to which the initial amount decayed. [/color][br][/*][/list][br]The [color=#980000]coordinates of the small brown circle [/color]will help you check the accuracy of your solution.

[i]Developed for use with Thomas' Calculus, published by Pearson.[/i]