The diameter of the Sun is 1.4 × 109 m and the diameter of the Earth
is 1.2756 × 107 m. Compare their diameters by division.
Find three repeater machines that will do the same work as a (×64)
machine. Draw them, or describe them using exponents
There are 864,00 seconds in a day. How many days long is a second?
Express your answer in scientific notation.
About 230 billion litres of water flows through a river each day. How
many litres of water flows through that river in a week? How many
litres of water flows through the river in an year? Write your answer
in standard notation
An inch is approximately equal to 0.02543 metres. Write this distance in standard form
The planet Uranus is approximately 2,896,819,200,000 metres away from the Sun. What is this distance in standard form?
The cells of a bacteria double itself every hour. How many cells will
there be after 8 hours, if initially we start with 1 cell. Express the
answer in powers.
The cells of a bacteria double in every 30 minutes. A scientist begins
with a single cell. How many cells will be there after
(a) 12 hours (b) 24 hours
A new born bear weighs 4 kg. How many kilograms might a five year
old bear weigh if its weight increases by the power of 2 in 5 years?
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