Answer: 8.4
Step-by-step explanation:
total degrees is 360, 40 degrees is 1/9 of 360, arc length is 1/9th of circumference. Circumference is 2лr and r is 12m. circumference is 24л meters. we use 3.14 for pi and 24 times 3.14 is 75.36
75.36/9=8.37333333 repeating rounded to nearest tenth is 8.4
