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A study investigated about 3000 meals ordered from Chipotle restaurants using the online site Grubhub. Researchers calculated
the sodium content (in milligrams) for each order based on Chipotle's published nutrition information. The distribution of
sodium content is approximately normal with mean 2000 mg and standard deviation 500 mg.
(a) What proportion of the meals ordered exceeded the recommended daily allowance of 2400 mg of sodium?
Round your answer to 4 decimal places.
I got 21.18, and then tried 21.19 and both were incorrect.