Answer: Most rocks do not contain organic material-most fossils are not organic anymore. One of the most common isotopes used in radiometric dating is uranium-235 or U-235. ... This makes it useful for dating rocks that are very old. Radioactive isotopes with short half-lives cannot be used for dating old rocks.
not 100% sure :/
What are the answer choices to choose from so i can answer
A. 1.9 mL to 8.7 mL because 1.9 is the lowest and 8.7 is the highest and the range is from lowest to highest.
Geothermal plants rely in energy from hot springs to produce electricity so the correct answer is B.
