In a certain chemical, the ratio of zinc to copper is 4 to 19. a jar of the chemical contains 684 grams of copper. how many grams of zinc does it contain?

About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

Is trapezoid abdc the result of a dilation of trapezoid mnpq by a scale factor of ? why or why not? yes, because ab and cd are each the lengths mn and qp. yes, because sides ab and cd are parallel to sides mn and qp. no, because ab is the length mn but cd is the length qp. no, because sides ab and cd have different slopes from sides mn and qp.