Answer:
Benzene
Explanation:
You need to calculate the densities for each compound.
EtOH = 5.85/7.5 = 0.78 g/mL
Benzene = 6.60/7.5 = 0.88 g/mL
0.88 > 0.78, thus benzene is denser than ethanol.
The formula is given, so this is basically a plug and chug problem.
Given values:
Plugging these values into the given equation, we get:
This is a 2 sig fig problem, so your final answer should be 
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The moon's orbit is not perfectly aligned with the equator and the earth rotates on an axis around 20 degrees off, so the earth and the moon only line up with the sun once or twice a year.
