A sample of ocean sediment is found to contain 4.60 milligrams of uranium-238 and 0.750 milligrams of lead-206. Estimate the age of the sediment. The half-life for the conversion of uranium-238 to lead-206 is 4.51 x 109 years.

What is the chemical formula of the following compound

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?