To ensure accurate radiometric dating, rock samples should be:

Which of the following was not among the early attempts to determine Earth’s age?

A break or gap in the geologic record resulting from erosion or nondeposition or both is a(n) ____.

At various times during Earth’s history, the western half of the United States has been covered by an inland sea.

In a well-sorted rock, ____.

The skull of a T. Rex is an excellent example of a trace fossil.

How many levels does the following variable have? Preference for a digital or analog watch

The verbal subset of the GRE has scores that are normally distributed, with a population mean of 500 and a population standard deviation of 100. Use this information to solve the following problems: 1. The percentile rank for a score of 654 2. The percentile rank for a score of 344 3. The proportion of the population with scores between 654 and 344 4. The proportion of the population with scores between 654 and 690 5. The verbal GRE score for a percentile rank of 67% **To receive credit for this problem you will need to show your work. This includes the formulas you used to calculate each value and the intermediate calculates. At the end of the exam you will be asked to upload a picture of your hand calculations.

Use the scores below to calculate the mean. **Report your answer to 4 decimal places. , , , , , ,

The verbal subset of the GRE has scores that are normally distributed, with a population mean of 500 and a population standard deviation of 100. Use this information to solve the following problems: 1. The percentile rank for a score of 690 2. The percentile rank for a score of 490 3. The proportion of the population with scores between 690 and 490 4. The proportion of the population with scores between 690 and 710? 5. The verbal GRE scores for a percentile rank of 12.1% **To receive credit for this problem you will need to show your work. This includes the formulas you used to calculate each value and the intermediate calculates. At the end of the exam you will be asked to upload a picture of your hand calculations.