The population of bigville increased from 387,480 to 571,533 in the last 7 years. during the same time period, smallville increased its population by 53.67%. which town is growing at the greatest rate and by what factor? (round to nearest hundredth) a) bigville by a factor of 1.13 b) bigville by a factor of 6.17 c) smallville by a factor of 1.13 d) smallville by a factor of 6.17