SOLUTION: The mass, m (g), of a radioactive sample of sodium decreases from an initial mass of 660 g by 5% each hour. Which range includes the mass of the amount of sodium left after 24 hour

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: The mass, m (g), of a radioactive sample of sodium decreases from an initial mass of 660 g by 5% each hour. Which range includes the mass of the amount of sodium left after 24 hour      Log On


   

Question 1026434: The mass, m (g), of a radioactive sample of sodium decreases from an initial mass of 660 g by 5% each hour. Which range includes the mass of the amount of sodium left after 24 hours?
530-550 grams
510-530 grams
180-200 grams
50-70 grams
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
180-200 grams.
You have to use the formula m%28t%29+=+660%281-.05%29%5Et+=+660%2A0.95%5Et, and then substitute t = 24 into it.