Answer:
7.5π
Step-by-step explanation:
First we should get the entire circle's circumference with 2rπ
2 * 5 * π = 10π
Now, because whats missing is a 90° arc, which is 1/4 of the circle, we can say the the rest of it is 3/4 of the circumference.
3/4 * 10π = 7.5π
