February 27, 2017

Homework Help: calculus

Posted by Anonymous on Sunday, March 25, 2012 at 2:17pm.

A searchlight rotates at a rate of 4 revolutions per minute. The beam hits a wall located 9 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle between the beam and the line through the searchlight perpendicular to the wall is 5? Note that ddt=4(2)=8

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