Question

The question is given in attachment. ​

Answer 1

Answer:

For a unit vector, magnitude is 1

$\sqrt{0.3^{2}+0.4^{2}+c^{2} }$=1

0.25+$c^{2}$=1

$c^{2}$=0.75

$c^{2}$=$\sqrt{0.75}$=0.87

Explanation:

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Answer 2

Answer:

root (0.3² + 0.4² + c² ) = 1

0.25 + c² = 1

c² = 0.75

c² = root ( 0.75) = 0.866

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