The state of Rhode Island covers an area of approximately 3 x 10^9square meters. The state of Alaska covers an area of approximately 2 x 10^12square meters.
About how many times larger is the area of the state of Alaska than the area of the state of Rhode Island?
O A. 150 times larger
B. 670 times larger
O c. 1500 times larger
D. 6700 times larger

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.