jonas practice guitar for 2 hours in 2 years. Bradley practice 4 more hours the joans. How many more practice id Bradley did the
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Vector 
. 
. So the sum is 
.
For the second, the magnitude is the square root of the sum of the squares of the components. This is equal to
.
For the second, the magnitude is the square root of the sum of the squares of the components. This is equal to