Ineed to know 1-3 don't even know where to start

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

What is the approximate time of death of the body temperature is 29.4 degrees celsius

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.