bear342
12.06.2020 •
Mathematics
4a. at what time range is the portion of the graph the steepest? explain what is happening during this time
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Ответ:
465 mi/h
Step-by-step explanation:
= Velocity of plane = 480 mi/h
a = Distance plane travels when it is 4 mi away from radar
= Velocity of plane with respect to height = 0 mi/h (altitude is not changing)
b = Horizontal distance between plane and radar = 1 mi
c = Distance between plane and radar after some time = 4 mi
From Pythagoras theorem
a²+b² = c²
⇒a = √(c²-b²)
⇒a = √(4²-1²)
⇒a = √15 mi
a²+b² = c²
Now, differentiating with respect to time
∴ Rate at which the distance from the plane to the station is increasing when it is 4 mi away from the station is 465 mi/h