Reread lines 251-256. what does the author convey with the statement, "the light goes out for the marsh.

The light, then, is the light that her friendship brought to his life. Her friendship is light -- it is happiness and is joy to Tom. When the two friends stop hanging out, the light goes out of the marsh. The author is saying the joy has gone out of Tom's life. 

Ruby becomes disappointed with Tom when the hose leaks and Ruby can no longer dive. The two stop hanging out, and Tom loses her friendship.

Sample response: No, Yin is not correct. If x = 19, the measure of angle ABC = 4(19) - 12 = 64. Therefore, the two base angles measure 64. An equilateral triangle is equiangular, so each angle would have to measure 60° because there are 180°in a triangle.