Respuesta :

ktaylormccann
the answer is b. hope this helped :)

[tex]5 \times {10}^{9} \times 7 \times {10}^{5} = [/tex]

[tex]35 \times {10}^{14} = [/tex]

[tex]3.5 \times 10 \times {10}^{14} = [/tex]

[tex]3.5 \times {10}^{15} [/tex]

And we're done....

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