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Answer:
- red boat distance: 42 miles
- angle at lighthouse: 22°
Step-by-step explanation:
The Law of Cosines can be used to find the distance from the red boat to the lighthouse.
b² = l² +r² -2lr·cos(B)
b² = 18² +30² +2·18·30·cos(120°) = 1764
b = √1764 = 42
The distance from the red boat to the lighthouse is 42 miles.
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The angle at the lighthouse can be found using the law of sines.
sin(L)/l = sin(B)/b
L = arcsin(l/b·sin(B)) = arcsin(18/42·sin(120°)) ≈ 21.79°
The angle between the boats measured at the lighthouse is about 22°.
Answer:
21 weeks
Step-by-step explanation:
150*21=3150
3150+850=4000
Answer:
135
Step-by-step explanation:
Interior angles add up to 180
180 - 88 - 47 = 45
x and 45 together are on a line creating 180
x = 180 - 45
x = 135
Answer:
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Step-by-step explanation: