practice

1. To the nearest order of magnitude, determine the number of seconds that pass or have passed …
   1. in the life of an average human
   2. in all of recorded history
   3. since modern humans first appeared
   4. since the dinosaurs went extinct
   5. since the earth was formed
   6. since the beginning of time
2. Write something.
3. Write something.
4. Write something completely different.

conceptual

1. [an error occurred while processing this directive]
2. [an error occurred while processing this directive]
3. [an error occurred while processing this directive]
4. [an error occurred while processing this directive]

numerical

1. [an error occurred while processing this directive]
2. [an error occurred while processing this directive]
3. [an error occurred while processing this directive]
4. [an error occurred while processing this directive]

algebraic

1. [an error occurred while processing this directive]
2. [an error occurred while processing this directive]
3. [an error occurred while processing this directive]
4. [an error occurred while processing this directive]

calculus

1. [an error occurred while processing this directive]
2. [an error occurred while processing this directive]
3. [an error occurred while processing this directive]
4. [an error occurred while processing this directive]

statistical

1. [an error occurred while processing this directive]
2. [an error occurred while processing this directive]
3. [an error occurred while processing this directive]
4. [an error occurred while processing this directive]

investigative

1. [an error occurred while processing this directive]
2. [an error occurred while processing this directive]
3. [an error occurred while processing this directive]
4. [an error occurred while processing this directive]

worksheets

1. [an error occurred while processing this directive]