Carbon-14 is used to determine the time an organism was living. the amount of carbon-14 an organism has is constant with the atmosphere, but when an organism dies the carbon-14 decays at a half-life of 5,730 years. if an archeologist measured the amount of carbon-14 in an organism and it was 25% of the total amount of atmospheric c-14, what is the age of the organism? 1432.5 years 5,730 years 11,460 years 17,190 years

=11,460 years

The initial amount was 100 %, which decayed to 25 %

Thus;  New amount = Original amount × (1/2)^n; where n is the number of half lives.

Hence;  25 = 100 × (1/2)^n

           =  1/4 = (1/2)^ n

          n = 2   (number of half lives)

Thus; the time will be; 5730 × 2 = 11,460 years

  = 11,460 years

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

the assestment will probley apele with cause and effect