We have a radioactive substance which decays according to the rule that the decay rate at any instant of time is proportional to the amount of substance left. If 1/4th of the substance disappears after 10 days, then approximately how much time (in days) will it take for half the substance to disappear?
About This Newsletter You received this email because you have registered with www.TestFunda.com. If you do not want to receive this email or want to sign up for other newsletters from TestFunda click here.
Please do not reply to this mail. Mails sent to this account will not be monitored. Post your comments and solutions under the Question of the Day forum.
Problems getting this mail? To get this mail in your inbox, add firstname.lastname@example.org to your contact list.