I think A might be wrong though
Well umm check calculator again maybe you did a mistake in typing one of the numbers
460 cm squared
Hope that helped XD
The scalar product, or dot product, of two vectors is the sum of the products of corresponding coordinates.
... u·v = (4, 4)·(-8, 3) = 4(-8) + 4(3) = -20
Then the product of a scalar and a vector is a vector with each of the original coordinates multiplied by the scalar.
... (u·v)v = -20v = -20(-8, 3) = (160, -60)
