We have the following vectors: u = 13j v = i + 3j The scalar product of both vectors is given by: u * v = (13j) * (i + 3j) We have then: u * v = (1 * 0) + (13 * 3) u * v = 0 + 39 u * v = 39 Answer: The scalar product of both vectors is given by: u * v = 39