tolong jawab no 15 dan 16 dong

1/rp=1/6+1/3=1/3 ==> rp = 3
R total = 3 + 3 = 6 Oh
I=v/r
I=9/6
I=1,5 A

lampu = 5x10x10 = 500 w
tv = 70x5 = 350w
setrika = 250x2 = 500
total = 1350 W x 30 hari = 40.500 W
40,5 Kwh x 400 = 16.200
ppn 10% 16200= 1.620
biaya total
16200+1620 = 17820