Slimp's Bookstore receives a box of books from each of five paperback publishers. Each box contains 20 different titles. The store manager decides there is room to display 4 books from each of 3 of the publishers. How many ways can the display be chosen? (Round your answer to the nearest one billion.)

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.