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A laser pointer is placed on a platform that rotates at a rate of 19 revolutions per minute. The beam hits a wall 8 m away,
producing a dot of light that moves horizontally along the wall. Let 0 be the angle between the beam and the line through the
searchlight perpendicular to the wall. How fast is this dot moving when 0 =
Wall
π
?
6
8 m
Laser
(Use decimal notation. Give your answer to one decimal place.)
velocity of the dot:
m/min

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