A ship is moving at a speed of 30 km/h parallel to a straight shoreline. The ship is 6 km from shore and it passes a lighthouse at noon. (a) Express the distance s between the lighthouse and the ship as a function of d, the distance the ship has traveled since noon; that is, find f so that s = f ( d ) (b) Express d as a function of t, the time elapsed since noon; that is, find g so that d = g ( t ) . (c) Find f ∘ g . What does this function represent?
A ship is moving at a speed of 30 km/h parallel to a straight shoreline. The ship is 6 km from shore and it passes a lighthouse at noon. (a) Express the distance s between the lighthouse and the ship as a function of d, the distance the ship has traveled since noon; that is, find f so that s = f ( d ) (b) Express d as a function of t, the time elapsed since noon; that is, find g so that d = g ( t ) . (c) Find f ∘ g . What does this function represent?
Solution Summary: The author explains how to express the distance between the lighthouse and the ship as a function of distance traveled since noon.
A ship is moving at a speed of 30 km/h parallel to a straight shoreline. The ship is 6 km from shore and it passes a lighthouse at noon.
(a) Express the distance s between the lighthouse and the ship as a function of d, the distance the ship has traveled since noon; that is, find f so that
s
=
f
(
d
)
(b) Express d as a function of t, the time elapsed since noon; that is, find g so that
d
=
g
(
t
)
.
(c) Find
f
∘
g
. What does this function represent?
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