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The human retina contains cells called rods and cones that absorb light and change it to electric signals sent to the brain. There are approximately

The human retina contains cells called rods and cones that absorb light and change it to electric signals sent to the brain. There are approximately 120,000,000 rods and 6,000,000 cones in a retina. How is the number of rods in a human retina written in scientific notation?

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