Question 303195
The problem states - Given J (-3,4) and K (-7, -2), find the magnitude of JK to the nearest tenth. 
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You would apply the "distance formula":
{{{d = sqrt((x2-x1)^2+(y2-y1)^2) }}}
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The two points:(-3,4) and  (-7, -2)
{{{d = sqrt((-7+3)^2+(-2-4)^2) }}}
{{{d = sqrt((-4)^2+(-6)^2) }}}
{{{d = sqrt(16+36) }}}
{{{d = sqrt(52) }}}

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