Answer: 10
Explanation:
Distance formula = (x2-x1)^2 + (y2-y1)^2
In this circumstance, we have (0,0) and (6,8) as our two points.
(6-0)^2 + (8-0)^2
(6^2) + (8^2)
36 + 64 = 100
Square root the 100.
SQRT of 100 is 10 (perfect square) so your answer is, again, 10.
I hope I managed to help.