tolong jawab no 13 !!!!!

13][
Q1 = 5 C
Q2 = 2 C
r = 2 m
F = ... ?
Penyelesaian:
F = k Q1 Q2/r²
F = (9 x 10^9)(5)(2)/(2)²
F = (90 x 10^9)/4
F = 22,5 x 10^9
F = 2,25 x 10^10