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We know that there are 32,000 ounces in 1 ton. Therefore we use this conversion factor in our calculations. So to convert:

8.9 x 10^5 tons * (32,000 ounces / 1 ton) = 2.848 x 10^10 ounces

 

Writing in 2 significant figures:

2.85 x 10^10 ounces

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Answer: 28.48x10^9 ounces.

Explanation:

We know that 1 ton = 32000 ounces.

Now, if we have 8.9x10^5 tons, how many ounces we have?

we know that each ton is equivalent to 32000 (or 3.2x10^4) ounces, so we need to multiply the number of tons by the number of ounces that each ton has:

8.9x10^5* 3.2x10^4 = (8.9*3.2)x(10^5*10^4) = (28.48)x10^(5+4) = 28.48x10^9

So 8.9x10^5 tons are equivalent to 28.48x10^9 ounces.

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