Answer: 6
Step-by-step explanation:
2sin^2 θ + sin θ - 1 = 0
2sin^2 θ + 2sin θ - sin θ - 1 = 0
2sin θ(sin θ + 1) - 1(sin θ + 1) = 0
(2sin θ - 1)(sin θ + 1) = 0
2sin θ - 1 = 0 or sin θ + 1 = 0
sin θ = 1/2 or sin θ = -1
The two values of sin θ are 1/2 and -1
Speed is v=10.75 m/h
time is t=1.9 h
distance is S=vt=10.75 m/h * 1.9 h = 20.425 miles
total surface area Stot = 688 mm2
lateral surface area Slat = 324 mm2
top surface area Stop = 182 mm2
bottom surface area Sbot = 182 mm2
20% is the answer
Hope this helps
