Answer:
3.311 ×10⁵ miles
Step-by-step explanation:
Distance between planet A and sun = 35.9 ×10⁴ miles
= 3.59 ×10⁵ miles
Distance between planet B and sun = 2.79 ×10⁵ miles
Distance between planet A and planet B = Distance between planet and sun - Distance between planet B and sun
= 3.59 ×10⁵ - 0.279 ×10⁵
= 3.311 ×10⁵ miles