Scores on the mathematics part of the SAT exam in a recent year were roughly Normal with mean 455 and standard deviation 120. You choose an SRS of 100 students and average their SAT math scores. If you do this many times, with a sample of size 100 each time, the standard deviation of the average scores will get close to:A. 120 B. 1.2 C. 12 D. None of the above.

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the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.

i need on these three questions. find standard form equation of line perpendicular to y = (2/3)x - 8 that goes through the point

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