Answer these questions using the method I just sent above

HYSICAL GEOLOGY 1.9 LAB EXERCISE Part D - Isotopic Systems Using what you learned in the previous section regarding absolute dating, de- termine the most appropriate methods and the ages of the materials in the follow- ing questions. 17. An Archeologist finds some cotton cloth at a burial site and wants to determine the age of the remains. Which isotopic system should they use? a. Carbon-14 b. Uranium c. Potassium-Argon 18. The Archeologist determines that there is 16.7% of the parent isotope remaining in the cloth sample. How old is the burial site? Hint: you can find the length of the half-life in the reading above. a. 13,559 years b. 14,798 years c. 16,743 years d. 1.66 billion years e. 1.81 billion years f. 2.05 billion 19. A geologist is trying to date a sequence of sedimentary rocks with abundant fossils and sandstones. Within the sequence is a distinctive clay layer that under closer inspection is fine-grained volcanic ash. Which of the following is the best way to obtain an absolute date for the sequence of rocks? a. Carbon date the fossils b. Potassium-Argon date the sands c. Uranium date the Zircons in the ash d. Identify the index fossils 20. The geologist determines there is 78.3% of the parent remaining in the sample that they examine. How old is the sequence of rocks? Hint: you can find the length of the half-life in the reading above. a. 187.5 million years b. 247.8 million years c. 390.7 million years d. 2.504 billion years e. 1.588 billion years f. 1.202 billion years