What was the atmospheric pressure of the storm in atmospheres and in pascals?

Question

Tropical cyclones are characterized by extremely low atmospheric pressure in the eye of the storm. The lowest recorded atmospheric pressure at sea level ever recorded was in Super Typhoon Tip as it passed over Guam in 1979. World and U.S. Lowest Barometric Pressure Records | Weather Extremes (wunderground.com)  That measurement was 879 millibar.

Answer 1

You can use google or a textbook or reference book to get the conversion factors between millibars and atmospheres and between millibars and pascals. If you looked them up you'd see that:

1013.25 millibars = 1 atmosphere

1 millibar = 100 pascals

Just like 5/5 = 1 and 100/100 = 1 and π/π = 1, we can say (1013.25 millibars)/(1 atmosphere) = 1 because they are equal to each other. Multiplying by the number "1" does not CHANGE the number, although using the conversion factor (1013.25 millibars)/(1 atmosphere) will change the way the number "879 millibars" appears. To make the answer come out correctly, we will need to flip the conversion factor over and make it (1 atmosphere)/(1013.25 millibars) and multiply 879 millibars by this conversion factor:

Notice that when it is set up in this way that the units of "millibars" will cancel out (there is "millibars" on the top and "millibars" on the bottom) leaving only units of atmospheres (which is what unit you want in the end). Then just divide 879 by 1013.25 to get the answer. You need to round to 3 sig figs because thats the number of sig figs in what you were given.

Do the same for the other problem, using the conversion of (100 pascals)/(1 millibar):