0. Kedija walked 300m from A to B and returned back and walked 200m and then stopped at 'C', what is her change in position from A to in the figure below
300m
200m
A
С
B
C/-500m
D 100m
B/ -100m
A Soom

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Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

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