evaluate (7/10)^-4 ÷. (7/10)^-6
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(7/10)^-4÷(7/10)-6
Let 7/10 be x.
=(1/x)^4÷(1/x)^6
=(1/x)^-2
=x^2
(7/10)^2
=49/100
=0.49
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