Afood handler notices that the temperature of the cooler is 55 what should the food handler do next

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Did the detergents containing enzymes work better at removing stains than those containing no enzyme? why or why not?

The chemical composition of soil varies with depth. an article in communications in soil science and plant analysis describes chemical analyses of soil taken from a farm in western australia. fifty specimens were each taken at depths 50 and 250 cm. at a depth of 50 cm, the average no3 concentration (in mg/l) was 88.5 with a standard deviation of 49.4. at a depth of 250 cm, the average concentration was 110.6 with a standard deviation of 51.5. find a 95% confidence interval for the difference in no3 concentrations at the two depths.