Question

Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to 1/8.00 of the original amount. How long ago was this plant alive?

Answer 1

Step-by-step explanation:

Phosphorus-32 has a half-life of 14.0 days Starting with 2.00 g of 32P

, how many grams will remain after 84.0 days.

Answer 2

Take three half lives.

5730 x 3 = 17190