Cameron and his brother spent 90 minutes at the zoo. The table shows the stops they
made.
How much time did they spend at the activity center?

Point $(x,y)$ is randomly picked from the rectangular region with vertices at $(0,,,2010),$ and $(0,2010)$. what is the probability that $x > 7y$? express your answer as a common fraction.

The table shows a pattern of exponents. what is the pattern as the exponents decrease?

What situation is an example of an observational study