Sodium-24 (24Na) is a radioisotope used to study circulatory dysfunction. A measurement found 4 micrograms of 24Na in a blood sample. A second measurement taken 4 hrs later showed 3.33 micrograms of 24Na in a blood sample. Find the half-life in hrs of 24Na. Round to the nearest tenth.

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)