Need help with 19 pls

the furthest the dog can be is 508 meters away from the house, and the closest he can be is 492 meters away from the house.

list

6,24,51,72,12,54,80,44,57,64,92,26,66,96

your welcome!

secant-secant formula:

(whole secant) x (external part) =           (whole secant) x (external part)

(8+y-2) *8=                                           (y+4+6) *6

(y+6)*8 = (y+10) *6

distribute

8y+48 = 6y +60

subtract 6y from each side

2y +48 = 60

subtract 48 from each side

2y = 12

divide by 2

y = 6

sv =     (y+4+6)

sv   = 6+4+6

sv = 16