A museum claims that one of its skeletons is 9,000 years old. An analysis reveals that the skeleton contains 28% of the expected amount of carbon-14 found in living organisms. Is the museum's claim...

A museum claims that one of its skeletons is 9,000 years old. An analysis reveals that the skeleton contains 28% of the expected amount of carbon-14 found in living organisms. Is the museum's claim justified? (Use the fact that the half-life of carbon-14 is 5,730 years. Round the percentage to the nearest whole number.)