Asample originally contains 16 grams of a radioactive isotope. after 36 days, 14.8 grams of the isotope remain in the sample. what is the half-life of the isotope? enter your answer in the box. round your answer to the nearest day.

Last month, leonhard euler's watch kiosk at the mall had total sales of $9,489. merchandise totaling $225 was returned. the goods that were sold cost leonhard euler's $5,481. operating expenses for the moth were $992. what was the gross profit on sales?