A culture of bacteria has an initial population of 9300 bacteria and doubles every 3 hours. Using the formula P = Po · 27, where Pt is the population after t hours, Po
is the initial population, t is the time in hours and d is the doubling time, what is the
population of bacteria in the culture after 10 hours, to the nearest whole number?

Astudent simplified a rational expression as shown.

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.

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.