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**cnmath16** **67. On a standard IQ test, the scores are normally distributed with a mean of 100 and a standard deviation of 20.**

**a) If you score 140, in what percentile are you?**

**b) If you score 90, in what percentile are you?**

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**68. Eldon received 72 on his first calculus test. The marks were normally distributed with a mean of 60 and a standard deviation of 8. He received 80 on the next test, which was normally distributed with a mean of 75 and a standard deviation of 6. Which was the better mark, relatively speaking? **