Final answer:
The circumference of a circle with a radius of 86 inches is given by the formula 2πr, which results in approximately 540.83794 inches, and is generally rounded to 541 inches.
Step-by-step explanation:
The circumference of a circle is given by the formula C = 2πr, where r is the radius of the circle and π (pi) is approximately 3.14159. For a circle with a radius of 86 inches, you would calculate the circumference by multiplying 2, the approximation of pi, and the radius of the circle.
Therefore, the circumference C is calculated as follows:
C = 2 × π × 86 inches
Which gives us:
C = 2 × 3.14159 × 86 inches
C = 540.83794 inches
However, we generally round to a reasonable number of significant figures based on the precision of the given data. Since the radius is given as 86 inches without further decimal places or significant digits, the circumference, when rounded, would typically be stated as: 541 inches.