9514 1404 393
Answer:
5
Step-by-step explanation:
A calculator can be useful when you want to evaluate a numerical expression.
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The applicable rules of exponents are ...
a^-b = 1/a^b
a^0 = 1 . . . . . . a≠0
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Your expression evaluates to ...
(1/5)^-1 × 4^0 = (5/1)^1 × 1 = 5
