a transverse wave on a really long rope travels with a speed of 15 m/s and a point on the rope takes 3.75ms to go from the equilibrium position to the maximum displacement from equilibrium. how far apart are two wave crests on the rope at any given time?

What is not true about kl and mn? what is mn? (show )

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

What is the slope of the line (-7,2) (4,6)