For what values of x does the graph of f(x) = x − 2 sin xhave a horizontal tangent? (use n as your integer variable. enter your answers as a comma-separated list.)

Do u just plot the numbers on the graph like (1,

Is the square root of 4 plus the square root of 16 rational?

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?