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How Many Significant Figures Are There in the Answer to the Following

question 116

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How many significant figures are there in the answer to the following problem?
56.4 + 0. 8822 + 21


Definitions:

Thylakoid Compartment

A structure within chloroplasts where light-dependent reactions of photosynthesis occur.

Hydrogen Ions

Protons or atoms of hydrogen that have lost their electron, thus carrying a positive electric charge.

ATP Molecules

Adenosine triphosphate molecules, which are the primary energy carrier in all living organisms, providing energy for cellular processes.

CAM Plants

Plants using Crassulacean Acid Metabolism, a photosynthetic pathway that conserves water by opening stomata at night.

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