Ответ:

-0, 04

Объяснение:

2,4а²

[tex]2.4 \times {a}^{ - 4} \times {c}^{9} \times \frac{3}{8} \times {a}^{6} {c}^{ - 10} [/tex]

[tex]2.4 \times {a}^{2} \times \frac{3}{8} \times {c}^{ - 1} [/tex]

[tex]0.9 \times {a}^{2} \times {c}^{ - 1} [/tex]

[tex]0.9 \times {0.2}^{2} \times { - 0.9}^{ - 1} [/tex]

[tex]0.9 \times 0.04 \times - \frac{10}{9} [/tex]

[tex] - 1 \times 0.04[/tex]

[tex] - 0.04[/tex]