exam Maths Puzzle Numerical Ability

I have this expression

square root of -144
which would be 12 12
break it out further it would be -3*4 and -3*4
so than it would be -4 square root 3?

These kind of problems play with your head. Is this correct?

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exam Other Question
how do you convert to standard form i dont have a text book im using nova net a right triangle has a 123 foot hypotenuse, and a 38 foot leg. to the nearest tenth of a degree, what are the sizes of its acute angles?

thank you