8,473,227 rounded to the nearest 100,000

Which logarithmic equation is equivalent to the exponential equation below? e^a=55(you will receive 34 points)

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9