Questions from Calculus


Q: Answer part (a) in Example 2 if the pond was

Answer part (a) in Example 2 if the pond was originally stocked with 600 fish and all other data are unchanged, how does the graph of the fish population in this case differ from the one in Example 2?...

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Q: Answer parts (a) and (b) in Example 2

Answer parts (a) and (b) in Example 2 if the pond has a carrying capacity of 2000 fish and all other data are unchanged. Example 2: A pond on a fish farm has a carrying capacity of 1000 fish. The pon...

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Q: For information being spread by mass media, rather than through individual

For information being spread by mass media, rather than through individual contact, the rate of spread of the information at any time is proportional to the percentage of the population not having the...

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Q: At one point in his study of a falling body starting from

At one point in his study of a falling body starting from rest, Galileo conjectured that its velocity at any time is proportional to the distance it has dropped. Using this hypothesis, set up the diff...

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Q: In an autocatalytic reaction, one substance is converted into a second

In an autocatalytic reaction, one substance is converted into a second substance in such a way that the second substance catalyzes its own formation. This is the process by which trypsinogen is conver...

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Q: A porous material dries outdoors at a rate that is proportional to

A porous material dries outdoors at a rate that is proportional to the moisture content. Set up the differential equation whose solution is y = f (t), the amount of water at time t in a towel on a clo...

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Q: Let c be the concentration of a solute outside a cell that

Let c be the concentration of a solute outside a cell that we assume to be constant throughout the process, that is, unaffected by the small influx of the solute across the membrane due to a differenc...

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Q: An experimenter reports that a certain strain of bacteria grows at a

An experimenter reports that a certain strain of bacteria grows at a rate proportional to the square of the size of the population. Set up a differential equation that describes the growth of the popu...

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Q: The health officials that studied the flu epidemic in Example 8 made

The health officials that studied the flu epidemic in Example 8 made an error in counting the initial number of infected people. They are now claiming that f (t) (the number of infected people after t...

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Q: Suppose that substance A is converted into substance B at a rate

Suppose that substance A is converted into substance B at a rate that, at any time t, is proportional to the square of the amount of A. This situation occurs, for instance, when it is necessary for tw...

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