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Two vectors are presented as veca = 3.0 ...

Two vectors are presented as `veca = 3.0 hati + 5.0 hatj and vecb = 2. 0 hati + 4.0 hatj.` Find (a) `vec a xx vecb`, (b) `veca. vecb`,(c ) `(veca + vecb).vecb`,

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`(a) 2.0 hatk , (b) 26,(c ) 46
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