You are planning a May camping trip to Denali National Park in Alaska and want to make sure your sleeping bag is warm enough.

You are planning a May camping trip to Denali National Park in Alaska and want to make sure your sleeping bag is warm enough. The average low temperature in the park for May follows a normal distribution with a mean of 32°F and a standard deviation of 8°F.Above what temperature must the sleeping bag be suited such that the temperature will be too cold only 5% of the time?