Question 13 • FL-1200330-Algebra 2 CR
Substitute the number of weeks into f(x) = −0.1x³ + 0.6x² + 85. At 8 weeks, the model gives 72.2 beats per minute, which is still above 70; at 9 weeks, it gives 60.7 beats per minute. Therefore, 9 weeks are necessary to bring the modeled resting heart rate below 70 beats per minute.
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