Annual sales of bottled water in a certain country in the period 2007–2014 could be approximated by

R(t) = 0.08t2 − 0.26t + 8.8 billion gallons  (0 ≤ t ≤ 7),
where t is time in years since 2007. According to the model, were annual sales of bottled water accelerating or decelerating in 2011?
How fast?
 billion gal/yr2

Public Answer

OXI0FL The First Answerer