Answer:

8.99 is the length of minor arc

Step-by-step explanation:

circumference = 81

81 / 3.14 = diameter (25.79) , 81 / 3.14 / 2 = radius (12.89)

Formula: 2(pi)radius (central angle/360)

40 / 360 = 0.11

0.11 * 12.89 = 1.43 * 3.14 = 4.49 * 2 = 8.99

i am unsure of this lol