Unformatted text preview: 14. Lana has purchased a car for $24 000. The value, V , in dollars, of the car is a
function of time, t , in years, depreciates according to the function I
§
V(t) = 24 00%;) . How long will it take for Leno’s car to depreciate to 10% of its initial value? (A4) E
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15. Polonium—ZIS is a radioactive substance that spontaneously decays into lead 1/ ' {1“
214. One minute after a 100mg sample of polonium—218 is place into a nuclear
chamber, only 80mg remains. Determine the halflife of polonium—ZIB. (A5) 7 7 f
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 Spring '11
 wasylyk

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