The function f(x) = 40sin(0.1x + 12) + 50 represents the number of items, f(x), made in a factory each day for x days. The data
used to generate the function was collected over 90 days.
2 answers:
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No, John is incorrect.
<h3>Correct work shown:</h3>
The correct answer should be x = 7 or x = -1