Question

If 100.0 g of carbon-14 decays until only 25.0 g of carbon is left after 11 460 y, what is
the half-life of carbon-14?

Answer 1

Answer:

5730 yr

Explanation:

25  = 100 (1/2)^11460/x       where x = half life

.25 = (1/2)^11460/x

log .25 / log.5   = 11460/x

x = 5730 yr