 #1
Mitza
 5
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Member warned that some effort must be shown in homework questions
 Homework Statement:

It's a three part problem
A ship is moving at a speed of 10 km/h parallel to a straight shoreline. The ship is 3 km from the shore and it passes a lighthouse at noon.
A. Let d be the distance (in km) that the ship has travelled since noon. Find the distance s between the lighthouse and the ship in terms of d. In other words, find a function f(d) such that s=f(d)
B. Express d as a function of time. In other words, find a function g(t) such that d=g(t)) where t is time elapsed (in hours) since noon.
C. Use composition to write down the distance between the lighthouse and the ship as a function of t.
 Relevant Equations:
 a^2+b^2=c^2 (maybe I'm not sure if this is what to use)
I really have no clue how to start this. I think I might have to use Pythagoras but I'm really not sure.