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.

b Find the exact value of k.

S0=7

therefore

i sub it in the equation where i got :

S(t)= 7e^-5k

what does S(t) equals? does it equals to 35?

thank you

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# Homework Help: Sugar dissolving in hot water

**Physics Forums | Science Articles, Homework Help, Discussion**