1. An art history professor assigns letter grades on a test according to the following scheme.A: Top 7% of scoresB: Scor...
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1. An art history professor assigns letter grades on a test according to the following scheme.
A: Top 7% of scores
B: Scores below the top 7% and above the bottom 55%
C: Scores below the top 45% and above the bottom 22%
D: Scores below the top 78% and above the bottom 9%
F: Bottom 9% of scores
Scores on the test are normally distributed with a mean of 65.7 and a standard deviation of 8.5. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary.