25 × a^-4 / 5^-3 × 10 × a^-8
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Answer:
3125*a^4
Step-by-step explanation:
25a^-4/5^-3*10*a^-8
=5^2*a^(-4+8)/5^-3
=5^(2+3)*a^4
=5^5*a^4
=3125*a^4
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