Q82 of 125 Page 38

Meteorology: One measure of average global temperature shows how each year varies from a base measure. The table shows results for several years.


See the table and answer the following:


a) Order the five years from coldest to warmest.


b) In 1946, the average temperature varied by –0.030C from the base measure. Between which two years should 1946 fall when the years are ordered from coldest to warmest?

a) In year 1978, the temperature was,


Multiplying both numerator and denominator by, we get



As we know that, to divide a decimal number by 10, 100 or 1000, we shift the decimal point in the number to the left by as many places as there are zeroes over 1, to get the quotient.


So, the temperature in year 1978 was 0.02° C.


Order of five years from coldest to warmest is:


1964 < 1965 < 1978 < 1958 < 2002


b) Since the temperature in 1946 was -0.03° C


Therefore, it lies between the year 1965 and 1978


-0.10 < -0.03 < 0.02


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