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factory A produces 4.6 * 10^8 bolts a year and factory B produces 6.3 * 10^8 bolts a year. what is the total number of bolts produced by these two factories?

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total bolts

[tex]=4.6*10^8+6.3*10^8\\=(4.6+6.3)*10^8\\=10.9*10^8[/tex]

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