One of Level 3's public DNS servers is 4.2.2.3. This is further explained below.
<h3>What is public DNS?</h3>
Generally, A public DNS server is one that provides users with a wealth of information on the websites that are hosted on certain IP addresses.
In conclusion, 4.2.2.3 is a public DNS server operated by Level 3.
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Hydrogen gas density is 0.08988 kg/m3 under STP (0°C, 1 atm), so the volume is
V=m / ρ = 18,000 / 0.08988 = 2.002 × 105 (m3).
Well think about it... 12 rolls is already out since they are asking about 16 rolls. 320 divided by 16 is 20. So, the service bought 20 cases of paper towels containing 16 rolls.
