Question

Question 3 (Essay Worth 10 points)

(01.05 MC)
A pilot is tying a CRJ-900 from Phoenix, Arizona, to Louisville, Kentucky. The aircraft cannot take off or land if the temperature on the field is not within its operating
imitations. The aircraft cannot operate if the temperature is at or below -40° F, or at or above 118" F.
Part A: Write an inequality to represent the temperatures in which the pilot can take off and land. (2 points)
Part B: Describe the graph of the inequality completely from Part A. Use terms such as open/closed circles and shading directions. Explain what the solutions to the
inequality represent. (4 points)
Part C: On an afternoon in June, the temperature in Phoenix, Arizona rose to 122° F. Could the pilot have taken off on this day? Why or why not? (4 points)

Answer 1

Part A: -40 ≤ t ≤ 118

Part B: This is an inequality with open circles on both ends. It is open at -40 and open at 118. The inequality is shaded towards the right, from -40 to 118. The solutions to the inequality represent temperatures in Fahrenheit where the aircraft can operate (take-off and land).

Part C: No, the pilot could not have taken off that day. Since the temperature rose to 122 degrees Fahrenheit, which is above the maximum operating temperature of 118 degrees Fahrenheit, the aircraft could not have operated safely at that temperature.