The time required to finish a test and normally distributed with a mean of 40 minutes in a standard deviation of eight minutes. what is the probability that a student chosen at random will finish the test and more than 56 minutes

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?