Question

Use this paragraph: The half-life of carbon-14 is 5,700 years. A certain sample of wood has 20 grams of carbon-14 when it is alive.

How many grams of carbon will it have after 5,700 years?

(1 point)
Responses

10 grams
10 grams

5 grams
5 grams

40 grams
40 grams

2 grams
2 grams

Answer 1

After one half-life (5,700 years) the amount halves: 20 grams × 1/2 = 10 grams. Correct choice: 10 grams.