One hundred teenagers are sampled at random about how much time (in hours) they spend doing homework on a given night. The results are displayed in the graph below. Predict about how many teenagers out of 250,000 would spend 1 hour doing homework on a given night. image 0db1c5215f1e4d9997025234b7f1621f

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.