Based on the tree diagram below, what is the probability that a student doesn’t have lice, given that the student tested negativ
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2 answers:
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Answer:
62.8 km per min
Step-by-step explanation:
Let the diagram of this situation is shown below,
In which is the angle made by light to the straight line joining the lighthouse and P,
∵ Light makes 4 revolutions per minute.
Also, 1 revolution = radians
So, the change in angle with respect to t ( time ),
Let x be the distance of beam from P,
Differentiating with respect to x,
If x = 1 km,
Hence, the beam of light moving along the shoreline with the speed of 62.8 km per min
