The number A of tablet computers sold in millions) can be modeled by the functionA = 4.5t2 + 43.5t +17, where t represents the number of years after 2010. a) In what year did the tablet computer sales reach 65 million? 2011
b) Find the average rate of change from 2010 to 2012. Round your answer to the nearest tenth of a million. Then interpret the meaning in the context of the situation.​