Answer:
18.8496 units (rounded o1ff to four decimal places)
Step-by-step explanation:
Arc length = 2 × π × r × 
r (radius) = 12 units ÷ 2 = 6 units
Central angle = 180°
For our semicircle, the arc length = 2 × π × 6 ×
= 18.8495559215 units
Or 18.8496 units (rounded o1ff to four decimal places)
Answer:
Step-by-step explanation:
hello :
D: (x + 9)2 + (y + 4)2 = 5
18 + 22 + 35 + 40 = 115
So the customer spent $115 and then returned the most expensive ($40) item.
115 - 40 = 75
So after the refund the customer has spent $75.
Hope it helps!