SOLUTION: The equation y = -4.290x2 + 612.6x - 21773 models the number y of people surveyed who felt comfortable at temperature x (in Fahrenheit). What temperature made the greatest per

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Question 853113: The equation y = -4.290x2 + 612.6x - 21773 models the number y of people surveyed who felt comfortable at temperature x (in Fahrenheit). What temperature made the greatest percent of people comfortable?
Select one:
a. 76.7
b. 71.4
c. 82.4
d. 61.2
Answer by ewatrrr(24785) About Me  (Show Source):