A humanities professor assigns letter grades on a test according to the following scheme. A: Top 13% of scores B: Scores below t
he top 13% and above the bottom 60% C: Scores below the top 40% and above the bottom 23% D: Scores below the top 77% and above the bottom 8% F: Bottom 8% of scores Scores on the test are normally distributed with a mean of 70 and a standard deviation of 9.6. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary
T = k/R where k is the constant of variation, T=time and R=speed. Plug in the given values:- 12 = k/60 k = 12*60 = 720 So the equation of variation is T = 720/R
