In 2013 the world consumption of oil was estimated at 3.3 ´ 1010 barrels per year. The world reserves of oil in 2013 were estimated as 1.324 ´ 1012 barrels. Estimate how many years the current reserves of oil will last assuming that consumption remains at the 2013 rate.

  about 37 years

Explanation:

If 100% of the estimated reserves are used at the current rate, it will take ...

  (1.234·10^12 bbl)/(3.3·10^10 bbl/yr) = 37.4 yr

It will take about 37 years to deplete the reserves.

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Your calculator can perform arithmetic using scientific notation.

if you're asking what comes out, it's steam.

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa