<span>(a - 2b) • (2a - b) is how you factor this using FOIL</span>
Answer:
37.9 cm
Step-by-step explanation:
Arc length is:
s = 2πr (θ/360°)
where r is the radius and θ is the arc angle.
40π cm = 2πr (190°/360°)
20 cm = r (190°/360°)
r = 37.9 cm
Start as 5/105
Then divide the numerator and denominator by 5 each to get
1/21
