Answer:
Runners that decrease times are not improving
Step-by-step explanation:
Answer:20.096
radius =r=4
Φ=288
π=3 14
Length of arc=Φ/360 x 2 x π x r
Length of arc=288/360 x 2 x 3.14 x 4
Length of arc=0.8 x 2 x 3.14 x 4
Length of arc=20.096
12 x (3 / 8)
9 / 2 <= improper form
<= mixed form
All have same ratio
15:6