A girl runs around a 1/4 mile track. Let d represent the distance run by the girl (in feet) from the start line, and let t represent the number of seconds since the girl left the start line. The function d = f (t) = 0.3t2 + 0.5t determine the distance (in feet) that the girl has run when the girl has been running for t seconds. What is the meaning of f(40) - f(13) / 40 -13? A. The change in time in seconds as the girl runs from the 13 foot mark to the 40 foot mark on the track. B. The distance traveled by the girl from t = 13 to t = 40 seconds C. The girl's distance (in feet) from the starting line after she runs for 27 seconds. D. The girl's average speed running from t = 13 to t = 40 seconds. E. The change in the girl's speed running from t = 13 to t = 40 seconds. and why is the answer not A?
A girl runs around a 1/4 mile track. Let d represent the distance run by the girl (in feet) from the start line, and let t represent the number of seconds since the girl left the start line. The function d = f (t) = 0.3t2 + 0.5t determine the distance (in feet) that the girl has run when the girl has been running for t seconds.
What is the meaning of f(40) - f(13) / 40 -13?
A. The change in time in seconds as the girl runs from the 13 foot mark to the 40 foot mark on the track.
B. The distance traveled by the girl from t = 13 to t = 40 seconds
C. The girl's distance (in feet) from the starting line after she runs for 27 seconds.
D. The girl's average speed running from t = 13 to t = 40 seconds.
E. The change in the girl's speed running from t = 13 to t = 40 seconds.
and why is the answer not A?
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