
Answer: 565.2 units.
Step-by-step explanation: The approximate circumference of a circle with a radius of 90 is calculated using the formula: Circumference = 2 * π * radius.
Given that the radius is 90 and using π as 3.14, the calculation would be: Circumference = 2 * 3.14 * 90 ≈ 565.2 units.
Therefore, the approximate circumference of the circle is 565.2 units.