x² + y² = 9 is the equation of a circle with center (0, 0) and radius 3.
This puts the vertices at (-3, 0), (3, 0), (0, -3), and (0, 3).
When is the tangent line vertical? <em>when it passes through the x-axis.</em>
Answer: (-3, 0), (3, 0)
4-1.175=2.825
There was 2.825 liters left in the tank.
Hope this helps.
Answer:
They act as an extension of the manufacturing company.
