tolong jawab pake cara ya!!!

9. Rabun dekat (hypermetropi)
Rumus :
P = 4-100/PP
P = 4-100/50
=4-2
=2 Dioptri____A
10. Dik : V = 340 m/s
t = 0,04 s
Dit : s?
Jawab : s = V.t
= 340 x 0.04
= 13.6 meter.____C


Semoga bermanfaat(σ≧▽≦)σ