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Two vectors, r with arrow ans s with arrow, lie in the xy plane. Their magnitudes...

Two vectors, r with arrow ans s with arrow, lie in the xy plane. Their magnitudes are 4.50 and 7.25 units, respectively, and their directions are 320° and 85°, respectively, as measured counterclockwise from the positive x axis. What are the values of the following products? (a) r with arrow · s with arrow (b) r with arrow ✕ s with arrow

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