Question

the distance between planets varies as they move in their orbits. the minimum distance from the earth to mars is about 0.35 au. about how many kilometers is that?
15,000,000 km
25,000,000 km
55,000,000 km
70,000,000 km

Explanation:

Step1: Recall 1 AU value

1 AU = $1.5\times10^8$ km

Step2: Calculate 0.35 AU distance

$0.35\times1.5\times10^8 = 5.25\times10^7$ km ≈ 55,000,000 km

Answer:

C. 55,000,000 km