# Transcribed Image Text: At noon, ship A was 14 nautical miles due north of ship B

Transcribed Image Text: At noon, ship A was 14 nautical miles due north of ship B. Ship A was sailing south at 14 knots (nautical miles per hour; a nautical mile is 2000 yd) and continued to do so all day.
Ship B was sailing east at 11 knots and continued to do so all day. Complete parts (a) through (e) below.
a. Start counting time with t = 0 at noon and express the distance s between the ships as a function of t.
s(t)
b. How rapidly was the distance between the ships changing at noon? One hour later?
At noon the distance between the ships was changing at a rate of
One hour later, the distance between the ships was changing at a rate of
c. The visibility that day was 5 nautical miles. Did the ships ever sight each other?
No
Yes
d. Graph s and
ds
together as functions of t for – 1sts3. Compare the graphs and reconcile what you see with your answers in parts (b) and (c). Select the correct graph below.
dt
Each graph is shown with a window of [- 1,3] by [0,50].
OA.
В.
OC.
D. Transcribed Image Text: ds
looks as if it might have a horizontal asymptote in the first quadrant. This in turn suggests that
ds
approaches a limiting value as t→00. What is this value? What
dt
e. The graph of
dt
is its relations to the ships’ individual speeds? Select the correct answer below and fill in the answer box to complete your choice.
(Type an exact answer, using radicals as needed.)
O A. The limit is
This limit is the square root of the differences of the squares of the individual speeds.
O B. The limit is
This limit is the square root of the sums of the squares of the individual speeds.

-25-