Pls help question on the photo

What is the length of an with endpoints a 3,2 and b 8,14

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

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.