With a half-life of 14.3 years, how long will it take for100 g...

If I 131 has a half-life of 8 days, what fraction will be left after a year?

Half life of radium is 44 years.The sample will reduce to 50% of its orignal value ater how many yea...

Three years ago, Jim was half as old as Tom. Three years from now, Jim will be half as old as Micha...

seven years ago, Gerry was half as old as Celine is now. In ten years, he will be 4/5 as old as Celi...

Eight years ago martha was half as old as susan will be when susan is one year older than rose will...

If the half life of Ir - 131 is 42 days, how much would be remaining after 168 days?

If the half life is 24360 years and after 1000 years I have 2.1 gm left, what was the initial qty....

one half of jeans age two years from now plus one third of her age three years ago is twenty years....

In seven years I will be half as old again as i am now. how old will I be two years from now.

Three and a half years ago, Alison Tatum was diagnosed with stage four lung cancer and told she had...

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