Anumber, plus one-third of itself, plus one-eighth of itself, equals 70. what is the number?

Which math sentence can be used to determine if the triangle is a right triangle?

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.

What is the number 321,000,000 in scientific notation? also what is the number? ?