The amount of a radioactive substance remaining as it decays over time is a=a0(0.5)^t/h, where a represents the final amount, a0 represents the original amount, t represents the number of years, and h represents the half-life of the substance. Carbon-14 is a radioactive isotope that has a half-life of 5,730 years. Approximately how many years will it take for carbon-14 to decay to 10 percent of its original amount?
A) 1,710 years
B) 3,420 years
C) 5,730 years
D) 11,460 years
