FFA New Horizons
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Think of the mantle like a peanut butter sandwich<span>. You have the two pieces of bread and the </span>peanut butter<span> between them. In the </span>mantle<span>, we have two layers of solid rock with heated flowing rock between them. Next is the outer core. •</span>ω•
Answer: How to protect the environment
Distance to the epicenter of an earthquake
It seems you need to move the decimal three times over, then you round the number. So the answer would be 5.5 x 10^3.