Answer:
Planet D
Step-by-step explanation:
1.5*10^9 = 1,500,000,000
1.07*10^8 = 107,000,000
5.7*10^7 = 57,000,000
2.29*10^6 = 2,290,000
It has the least amount.
Planet C
1.5 x 10e9 = 1.5 billion
1.07 x 10e8 = 107 million
5.7 x 10e7 = 57 million
2.29 x 10e8 = 229 million
