[tex] \frac{ {4}^{ - 4} \times {16}^{ - 3} }{ {64}^{ - 5} } = \frac{ {4}^{ - 4} \times ( {4}^{2} ) {}^{ - 3} }{( {4}^{3}) {}^{ - 5} } = \frac{ {4}^{ - 4} \times {4}^{ - 6} }{ {4}^{ - 15} } = \\ = \frac{ {4}^{ - 10} }{4 {}^{ - 15} } = 4 {}^{ - 10 - ( - 15)} = 4 {}^{ - 10 + 15} = {4}^{5} = 1024[/tex]
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[tex] \frac{ {4}^{ - 4} \times {16}^{ - 3} }{ {64}^{ - 5} } = \frac{ {4}^{ - 4} \times ( {4}^{2} ) {}^{ - 3} }{( {4}^{3}) {}^{ - 5} } = \frac{ {4}^{ - 4} \times {4}^{ - 6} }{ {4}^{ - 15} } = \\ = \frac{ {4}^{ - 10} }{4 {}^{ - 15} } = 4 {}^{ - 10 - ( - 15)} = 4 {}^{ - 10 + 15} = {4}^{5} = 1024[/tex]