Answer:
4
Step-by-step explanation:
The perimeter of the region is equal to the sum of the perimeter of the four semicircular arc. Since the semicircular arcs have the same measure, therefore:
Perimeter of region = 4 × Perimeter of semicircular arc.
The side of the square = diameter of the semicircle = 2/π.
The radius of semicircle = diameter/2 = 
The perimeter of a semicircle = perimeter of a circle ÷ 2

Answer:
i just know its not B or C im sorry thats all i know
Step-by-step explanation:
i did take the test more than two times thats how i know
A) 9.573 x 10^7
B) 4.2 x 10^3
C) 9.6 x 10^-6
Brainliest?