Answer:
C. 1/49
Step-by-step explanation:
When there is a negative sign located inside the power, you must eliminate it. To do so, put the whole expression under 1, and then simplify from there:
7^-2 = 1/(7^2)
Simplify: 7^2 = 7 x 7 = 49
1/49 is your answer.
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