Final answer:
The circumference of the circle is 30π inches.
Step-by-step explanation:
The circumference of a circle can be found using the formula C = 2πr, where π represents the mathematical constant pi and r is the radius of the circle.
In this case, the radius of the circle is given as 15 in., so we can substitute this value into the formula:
C = 2π(15 in.)
C = 30π in.
Therefore, the circumference of the circle in terms of π is 30π inches.