Why do whole numbers raised to an exponent get greater, while fractions raised to an exponent get

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Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

What could explain what happened when the time was equal to 120 minutes