Ineed a number that is smaller than 19 and has more factors than 21

What is the standard form of -5x^2+2x^4-11+x^3+3x

Which of the following graphs represents the function f(x) = 2^x

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?