SOLUTION: The problem states - Given J (-3,4) and K (-7, -2), find the magnitude of JK to the nearest tenth. Please help me with this. Thanks

Question 303195: The problem states - Given J (-3,4) and K (-7, -2), find the magnitude of JK to the nearest tenth.
Please help me with this.
Thanks
Found 2 solutions by nerdybill, nyc_function:
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
The problem states - Given J (-3,4) and K (-7, -2), find the magnitude of JK to the nearest tenth.
.
You would apply the "distance formula":

.
The two points:(-3,4) and (-7, -2)

.
Oh, I guess they want the answer to the nearest tenth:
d = 7.2

Answer by nyc_function(2741) (Show Source): You can put this solution on YOUR website!
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
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