11 A spoonful of sugar is dissolving in hot water. The initial mass of the sugar was 7 grams(adsbygoogle = window.adsbygoogle || []).push({});

and 5 minutes later the mass present had halved. The mass of sugar, S grams, at time

t minutes after it was placed in the hot water can be modelled by S(t) = S0e−kt, t ≥ 0.

a State the value of S0.

b Find the exact value of k.

c Sketch the graph of S(t).

d To the nearest second, how long after the sugar was

placed in the hot water was its mass 1 gram?

how do i graph part c on my calculator, which equation do i use to graph it?

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# Graphing an Exponential

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