Respuesta :

Hi1315

Answer:

[tex] 1.12 \times {10}^{10} \\ [/tex]

Step-by-step explanation:

[tex](2.8 \times {10}^{4}) \times (4 \times {10}^{5} ) \\ 2.8 \times 4 \times {10}^{4 + 5} \\ = 11.2 \times {10}^{9} \\ = 1.12 \times {10}^{10} [/tex]

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