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Mathematics 8 Online
OpenStudy (kweenlexis):

A single tree produces about 2.6 × 10² lb of oxygen each year. The Amazon rainforest has about 3.9×1011 trees. About how many pounds of oxygen are produced in the rainforest each day ? Enter your answer in the box. 2.8 × 10^? lb So pretty much whats the exponent to the answer they gave.

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