A rock is thrown straight up from the edge of a 30m cliff (on planet earth), rising 10m, then falling all the way down. Find the rock's velocity that it hits the ground.
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Explanation:
mercury orbits the sun in 87 24/25 Earth days. Venus orbits the sun in 224 7/10 Earth days, and mars orbits the sun in 686 49/50 days. Write each mixed number as a decimal
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