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A river flows northward at 7 miles per hour. A boat crosses westward at 3...

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A river flows northward at 7 miles per hour. A boat crosses westward at 3 miles per hour.a. Draw a diagram that shows the boat's resultant velocity in the river.b. Write vectors for the river (r) and boat (b), and boat's resultant velocity in the river in componentform:r=b =r+b=c. What is the speed of the boat in the river?

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