A person comes into donate a unit of blood, and when the don…

A person comes into donate a unit of blood, and when the donor rolls up his sleeve for a blood pressure reading, the donor room technician notices a tattoo.  When asked about the time the tattoo was made the donor answers,  “two years ago.” Is this donor approved for a blood donation?

Three students have made multiple measurements of the solubi…

Three students have made multiple measurements of the solubility of sodium chloride (in gof NaCl per 100 g of water). Their results are summarized in the table below. The correctvalue for the solubility of sodium chloride is 35.9 g. Which student’s measurements are neither accurate nor precise?