Posted by Anonymous on Tuesday, April 3, 2012 at 3:38pm.
carbon 14 has a hlf life of 5700 years. scientists use this fact to determine the age of things made up of organic material. Suppose the average page of a book containing approximitly .5 mg og carbon 14 was put into a time capsule. How much carbon14 will each page contain after each of the following of years? a. 5700 b. 11400 c. 22800 d. 34200

algebra  Steve, Tuesday, April 3, 2012 at 5:15pm
If a(t) is the amount of C14 after t years,
a(t) = .05 * 2^(t/5700)
do you see why this works? every 5700 years, the exponent of t decreases by 1, from 0 to 1 to 2, etc. making the multiplier 1, 1/2, 1/4, ...
a(5700) = .05*2^(1) = .025
a(11400) = .05*2^(2) = .0125
and so on

algebra  Anonymous, Wednesday, March 11, 2015 at 9:19am
13300
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