What is the length of stack P Q with bar on top ? Round to the nearest tenth of a unit.

units

http://static.k12.com/calms_media/media/1578500_1579000/1578501/1/b228a746cddf3f53e96faaa89f4d4574b415b5c0/MS_IMC-150122-130505.jpg

Question

What is the length of stack P Q with bar on top ? Round to the nearest tenth of a unit.
 
    units
 
http://static.k12.com/calms_media/media/1578500_1579000/1578501/1/b228a746cddf3f53e96faaa89f4d4574b415b5c0/MS_IMC-150122-130505.jpg

anonymous · Answer

@Data_LG2

anonymous · Answer

use the distance formula: $\sf \Large PQ=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

anonymous · Answer

$\sf Q(x_2, y_2)=(6,1)\P(x_1,y_1)=(-3, 7)$

anonymous · Answer

$$\sqrt{(6-(-3)^{2}+ (1-7)^{2}}$$  ? @Data_LG2

anonymous · Answer

yes, then evaluate it and you'll get..?

anonymous · Answer

$$\sqrt{81+-36}$$

anonymous · Answer

then..?

anonymous · Answer

just keep going, you're right :)

anonymous · Answer

then i would get $$\sqrt{45}$$ and after i find the square root of it?

anonymous · Answer

yeah then round your answer to the nearest tenth