Total power generated by wind worldwide doubled between 2011 and 2016. At the end of 2016, world wind-energy generating capacity was about 487 thousand megawatts. Find the continuous growth rate and give a formula for wind-generating capacity W (in thousand megawatts) as a function of t, the number of years since 2011.
Give your answer for the growth rate accurate to two decimal places and the parameters in your formula accurate to four decimal places.