A special tour was scheduled to start at 5 o’clock in the afternoon but started a half an hour late. If the tour ended at half past seven in the evening, how long did the tour last?

Written By P. Roland
P. Roland
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The manager ordered 15 boxes of napkins, 3 boxes of paper cups, and 5 boxes each of plastic forks, knives, and spoons. How many boxes did he order in total?
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The aquarium opens at 10 o’clock in the morning and closes at 8:30 in the evening. How many hours is it open?