Scores on a test have a mean of 67 and Q3 is 85. The scores have a distribution that is approximately normal. Find the standard deviation. Round your answer to the nearest tenth.

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 base of 1/9 to the power of 2

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?