They’re complimentary angles (add up to 90)
Find total area
area=14 ties 12=168 ft^2
9 hours
168/9=56/3=18.6666666 ft^2 per hour
round
18.7 ft^2 per hour
Answer:
Neon= -10+10= 0 on no change
oxide=-10+8=-2
copper=-27 +29 = 2
tin= -50 +50 = 0 or no change
Step-by-step explanation:
Its basically subtraction ( i pretty sure thats right)