toaz.info-mathematics-2-weber-kunkel-martinez-and-shultis-oxford-2018-pdf-pr_ec2d38046ecccf7e7d7ec6294557323e (4)

The International Space Station (ISS) is a habitable station orbiting Earth several
4
each day. It is a joint project of ve space agencies from Europe, Canada, Japan,
times
and the United States and it has been continuously inhabited since the year
Russia
Its goal is to help conduct scientic research and possibly be a stopping point for
2000.
online to nd the current astronauts aboard the ISS. Represent the ratio
Go
the number of astronauts from each country in four dierent ways. Which
of
b Expedition 42 had a ratio of women to men of 2 : 4. Represent the ratio of women
is very expensive to bring water to the station, so much of the water consumed by
It
is recycled from a variety of sources. The ratio of the amount of water
astronauts
for food (for one astronaut) to the amount of water one astronaut drinks is
used
: 43. Find the percentage of total water that is used for drinking (assuming that
21
Because the ISS orbits the Earth several times each day, astronauts see multiple
d
and sunsets. An “ISS day” is 6.25% of an Earth day. Represent the ratio of
sunrises
ISS day to an Earth day as a fraction in its simplest form. Hence nd the number
an
times the ISS orbits Earth in one day.
of
future trips to the Moon or Mars.
a
eb link
representation is the most eective? Explain.
to the total number of astronauts as a percentage.
c
water is not used for any other purposes).
18
1 Ratios and proportions