A bee with velocity vector r′(t)r′(t) starts out at (3,1,−5)(3,1,−5) at t=0t=0 and flies around for 99 seconds. Where is the bee located at time 99 if ∫90r′(u)du=0∫09r′(u)du=0 ?

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.