# Trig: graphs and equations questionWatch

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#1
I am confused at this question:

The minimum depth, d ft, of water in a harbor t hours after midnight can be approximated by the function

A ship with a draught of 25 ft is in harbor at midnight. By what time must it leave to prevent grounding?

I don't understand what draught exactly means, even after googling. Seeing there was a value, I set d(t) = 25 and solved for t:

The answer is 4.36am. I've tried sketch a graph and looking at it but it makes no sense. I need a few pointers please!
0
4 years ago
#2
(Original post by tenki)
I am confused at this question:

The minimum depth, d ft, of water in a harbor t hours after midnight can be approximated by the function

A ship with a draught of 25 ft is in harbor at midnight. By what time must it leave to prevent grounding?

I don't understand what draught exactly means, even after googling. Seeing there was a value, I set d(t) = 25 and solved for t:

The answer is 4.36am. I've tried sketch a graph and looking at it but it makes no sense. I need a few pointers please!
0
#3
(Original post by keromedic)
0
4 years ago
#4
(Original post by tenki)
You should be.
0
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