Respuesta :
Applying the law of sines, when the first lighting was made, the distance from the ship to the lighthouse was: 3.2 miles.
What is the Law of Sines?
The law of sines is expressed by the equation, sin A/a = sin B/b = sin C/c.
Using the information we are provided with, the diagram that shows the ship and other information is drawn and shown in the image attached below, where:
m∠CAB = 65 + 30 = 95°
m∠BCA = 50 - 30 = 20°
m∠B = 180 - 95 - 20 = 65°
c = the distance from the ship to the lighthouse
Considering triangle ABC, use the Law of Sines to find c:
sin B/b = sin C/c
B = 65°
b = 8.5 miles
C = 20°
Plug in the values
sin 65/8.5 = sin 20/c
Cross multiply
c(sin 65) = (8.5 × sin 200)
Divide both sides by sin 65
c(sin 65)/sin 65 = (8.5 × sin 200)/sin 65
c = (8.5 × sin 200)/sin 65
c ≈ 3.2 miles
Thus, when the first lighting was made, the distance from the ship to the lighthouse was: 3.2 miles.
Learn more about the law of sines on:
https://brainly.com/question/2807639
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