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The half life for the radioactive decay of rubidium-87 to strontium-87 is 4.88 x 100 years. Suppose nuclear chemical analysis shows that there is 0.439 mmol of strontium-87 for every 1.000 mmol of rubidium-87 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits. ? ol A
Complete the following table. Round each of your answers to 3 significant digits. energy content when eaten food an ounce of breakfast corn flakes a corn muffin to a cup of grapefruit juice cal 1.10 x 10 0 0 kcal 0 145. 0 kJ 0 0 481. X 5 ?