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I didn't draw a diagram, but this is simple multiplication.  178 x 4 = 712.  The boat traveled 712 miles in 4 weeks.  (I'm not good with expanded form, but that's the total miles.  Get a few more answers that may suggest a good expanded form.)

Answer:

The ferry boat traveled 712 miles in 4 weeks.

Step-by-step explanation:

Ferry boat traveled in one week = 178 miles

It traveled in 4 weeks = 4 × 178

= 4 × (100 + 70 + 8)

= (4 × 100) + (4 × 70) + (4 × 8)

= 400 + 280 + 32

= 712

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