Consignment Sale. Just Between Friends is the leading pop-up consignment sales event franchise in North America. The Des Moines
event for Just Between Friends takes place each year at the Iowa State Fairgrounds for one week in the spring and one week in the fall. Families can earn money on gently used baby clothes, baby gear, maternity items, kids' clothes, shoes, toys, and books. Families sign-up as consignors and then price and tag their own items. At the end of the sale, consignors are given a check based on their item sales. Using historical records, the Des Moines event organizers advertise that their consignor check amounts follow a bell-shaped distribution (symmetric and unimodal) with a mean of $480 and a standard deviation of $110. Use the Empirical Rule: What percentage of consignors receive a check for more than $370
This is a fairly easy half-life problem Each half-life reduces the radioactive material by one half. So after 72 hours the radioactive material would have undergone 6 half-lives. 2^6 = 64. So, there will be one sixty-fourth of the material left. 520 / 64 = 8.125 grams will remain. radioactive decay is an exponential decay function.
