A baseball is thrown down from a 27-foot high roof with an initial speed of 32 feet per second. The height in feet, h, of the baseball can be modeled by the equation h =-1672 – 32t + 27, where t represents time in seconds. How long before the ball hits the ground? Round your answer to the nearest hundredth. The ball will hit the ground in seconds. (The negative answer is not possible.)​

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.