Answer:
On June 1, 2013, Anchorage, Alaska experiences 18 and 1/4 hours of daylight.
In a 24-hour day, there are 24 - 18 and 1/4 = 5 and 3/4 hours without daylight.
Therefore, the number of hours without daylight on June 1, 2013 in Anchorage, Alaska was 5 and 3/4 hours.