C. is not a function since all the F9x) numbers are identical
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<span>going downstream -
t = 14/(2 + v)
going upstream -
t = 7/(2 - v)
14/(2 + v) = 7/(2 - v)
(2 + v)/2 = 2 - v
v = 2/3km/h</span><span>
</span>
Answer:
WHERE IS THE ANSWER
Step-by-step explanation: