Mathematics
ayshiarenae16
21

The table below shows the distance d(t) in feet that an object travels in t seconds. t d(t) (second) (feet) 1 15 2 60 3 135 4 240 What is the average rate of change of d(t) between 2 seconds and 4 seconds and what does it represent? A) 50 m/s; it represents the average speed of the object between 2 seconds and 4 seconds B) 90 m/s; it represents the average speed of the object between 2 seconds and 4 seconds C) 90 m/s; it represents the average distance traveled by the object between 2 seconds and 4 seconds D) 50 m/s; it represents the average distance traveled by the object between 2 seconds

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(1) Answers
Kosterk

B) 90 m/s; it represents the average speed of the object between 2 seconds and 4 seconds proof the main formula is v= D / Dt,  D=Dfinal - Dinitial                                                     Dt= tfinal - tinitial so between t=2 and t= 4, V = 240-60/ 4-2= 90m/s

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