3) A certain sum amounts to * 5,292 in two
years and * 5,556.60 in three years, interest
being compounded annually. Find:
(i) the rate of interest
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Intergalactic gas is so tenuous that it emits no light of its own. ... Instead astronomers study it indirectly by observing how it selectively absorbs the light coming from faraway sources known as quasars.
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