Complete the table shown to the right for the half-life of a certain radioactive substance. k= (Round to six decimal places as needed.) Half-Life Decay Rate, k 16.3 days

The average percent defective product of a manufacturing plant is 1.20%. On a particular day 50 pieces were rejected out of a total daily production of 2730 pieces. What is the percent increase of defective pieces for the day above the average percent defective? Round the answer to 2 decimal places.

The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of radioactive actinium will remain after 19 years?