Question

I NEED HELP PLEASE, THANKS! :)

Answer 1

The answer is option A

Answer 2

As you know, a parallelogram's area is calculated by multiplying the length of it's sides, so all we are being asked to do is find the product of u and v -

`( - 4i - 9j + k )( - 6i + j + 5k ),\\`

You would apply cross products in order to determine u * v. Doing so, you would get a solution of -46i + 14j - 58k.

Now we can take the magnitude of this vector -

u * v = √( - 46 )^2 + ( 14 )^2 - ( 58 )^2,

u * v = ( About ) 75.3 square units,

Solution = Option A