Carbon dating of small bits of charcoal used in cave paintings has determined some of the paintings are from 10,000 to 30,000 years old. Carbon 14 has a half life of 5730 years. In a 1-μg sample of carbon from a living tree, the activity of carbon-14 is 6.4 6.4 μCi. If researchers determined that 1 μg of charcoal from a prehistoric cave painting in France has an activity of 0.80 μCi, what is the age of the painting?

Dmight be the correct answer

What record? the question is incomplete

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.

Hello.the answer is  hydrosphere, geosphere, and biosphere  have a nice day