Answer:
4sqrt(29)
Explanation:
||4v|| = 4 ||v||
4 × sqrt[2² + (-5)²]
4 × sqrt(4 + 25l
4 × sqrt(29)
Where,
sqrt: square root
sqrt(464)
|| 4v|| = || 4* (2i - 5j) ||
=|| 8i -20j||
We need to find the magnitude
|| 4v|| = sqrt( 8^2 + (-20)^2))
= sqrt(64+ 400)
= sqrt(464)
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