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\leftline{Mathematics 133 -- Intensive Calculus for Science 1}
\leftline{Quiz 1 -- September 9, 2005}
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\leftline{Your Name: $\underline{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }$}
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Do all work on this sheet (front and back if needed).  You have 20 minutes.
No calculators on this one.
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A)  The number $N$ of bacteria in a culture (in 1000's) 
is a function of time (in hours), so $N = f(t)$.
Explain the meaning of the equation $f(4) = 20$ in terms of the number 
of bacteria present.
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B) The price of a computer stock was \$45 on September 9.
That day a flaw was discovered in the company's most popular computer
and the stock price began to decrease.  Give a formula
for the price $t$ days later, and say what type of 
function you have if
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\item{1)} the price decreases by $2.50\%$ per day
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\item{2)} the price decreases by $\$2.50$ per day
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