Creating and Graphing Two Variable Equations Practice Test

A rectangular garden has a perimeter of 120 feet. If the length is represented by $$l$$ and the width by $$w$$, and the area must be at least 800 square feet, which system of equations and inequalities correctly models this situation?

The population of a bacteria culture doubles every 4 hours. If there are initially 250 bacteria, which equation represents the population $$P$$ after $$t$$ hours, and what would be the appropriate scale for the y-axis when graphing this relationship for the first 16 hours?