tolong dong....nomer 4 saya kurang paham + nggak bisa

●PHYSICS SOLUTION●

ρ = m / V
m = ρ × V
= 7.900 kg/m³ × 30 ml
= 7.900 kg/m³ × 30 cm³
= 7.900 kg/m³ × 0,00003 m³
= 0,237 kg
= 237 g

^_^