Question 303195
I assume you are talking about vectors.

Let |JK| = the magnitude that we are seeking.

We use the distance formula.

|JK| = sqrt{(-7 -(-3))^2 + (-2 - 4)^2}

|JK| = sqrt{(-7 + 3)^2 + (-6)^2}

|JK| = sqrt{(-4)^2 + 36}

|JK| = sqrt{16 + 36}

|JK| = sqrt{52}

|JK| = 7.2111102551

We round this decimal to the tenths place and get

|JK| = 7.2