Question

To the nearest tenth, what is the distance between (7,4) and (12,5)?
a) 4.8 units
b) 4.9 units
C) 5.0 units
d) 5.1 units

Please explain. Thank you.

Answer 1

The squared distance is sum of squares of difference of all coordinates.

d^2 = (x1-x2)^2 + (y1-y2)^2 = (7-12)^2 + (4-5)^2, so... ;)

Answer 2

Thanks!

Answer 3

Welcome ;)

Answer 4

The answer was about 5.1 by the way.