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the 1996 Olympics, Michael Johnson won the 200 m race
At
a time of 19.32 seconds. Donovan Bailey won the 100 m
with
with a time of 9.84 seconds. Both men claimed to be
race
World’s Fastest Man”.
“The
b Explain why this interpretation makes sense.
said that this is not a fair comparison. Explain why
Bailey
is justied in saying so.
he
In order to see who the ‘fastest man’ was, the two ran a race
d
150 m in 1997. Using their results from the Olympics,
of
won the race in 14.99 seconds. How does this compare
Bailey
his speed for the 100 m race? Show your working.
to
Human Genome Project is an international collaboration
The
map the three billion base pairs in the human genome,
to
complex set of genetic instructions. Over 1000 scientists
the
six dierent countries collaborated on the project, which
from
over13years to complete. Genome size (measured
took
picograms) is the amount of DNA contained in a single
in
a table with the number of picograms in one
Construct
and the corresponding number of base pairs
column
b Is this a proportional relationship? Justify your answer.
Find the number of picograms if there are 11 247 million
d
pairs. Show your working using both a proportion and
base
12
Who had the faster speed? Show your working.
a
The media reported that Johnson was a faster runner than Bailey.
c
predict the time for each in the 150 m race.
e
13
genome. One picogram (pg) contains 978 million base pairs.
a
(in millions) in the other. Show at least four rows.
c
Write an equation for the data in your table.
your equation.
38 1 Ratios and proportions