Answer:A
Explanation:
The question given information for two co-ordinates
(7,4) = P and (3,-4) = P' according to the quesion
We can use pythagorean theorem to find the answer
a^2+b^2=c^2
The distance in x-axis between point P and P' = 4
and the distance in y-axis between point P and P' = 8
4^2+8^2 = c^2
C = 8.944