Exam 4: Analyzing Change: Applications of Derivatives
Exam 1: Ingredients of Change: Functions an Limits50 Questions
Exam 2: Describing Change: Rates47 Questions
Exam 3: Determining Change: Derivatives48 Questions
Exam 4: Analyzing Change: Applications of Derivatives50 Questions
Exam 5: Accumulating Change: Limits of Sums and the Definite Integral50 Questions
Exam 6: Analyzing Accumulated Change: Integrals in Action51 Questions
Exam 7: Ingredients of Multivariable Change: Models, Graphs, Rates46 Questions
Exam 8: Analyzing Multivariable Change: Optimization50 Questions
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Given the units of measure for production and the units of measure for cost or revenue. Write a sentence interpreting the marginal as an increase. Revenue is given by
hundred dollars when q thousand units are sold;
.


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Correct Answer:
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The future value of an investment after t years is given by
thousand dollars. Use the linearization to estimate the future value after 10.5 years.

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The population of a certain region between 1790 and 2000 can be modeled by
thousand people x years after 1790. Use the rate of change of the population of the region in 2000 to estimate, to the nearest thousand, the population in 2003.

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A street vendor constructs the table below on the basis of sales data. Construct a model for consumer expenditure (revenue for the vendor). Sales of Roses, Given the Price per Dozen 

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The table lists the time in seconds that an average athlete takes to swim 100 meters freestyle at age x years. Find a model for the data. Time That an Average Athlete Takes to Swim 100 Meters
Freestyle 

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The population of a certain region between 1790 and 2000 can be modeled by
thousand people x years after 1790. Find the rate of change of the population of the region in 2000 to the nearest thousand people per year.

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Boyle's law for enclosed gases states that at a constant temperature, the pressure is related to the volume by the equation
, where k is a constant. If the volume is increasing at a rate of 8 cubic inches per hour, at what rate is the pressure changing when the volume is 40 cubic inches and
inch-pounds?


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A tin-container manufacturing company uses the same machine to produce different items such as popcorn tins and 30-gallon storage drums. The machine is set up to produce a quantity of one item and then is reconfigured to produce a quantity of another item. The plant produces a run and then ships the tins out at a constant rate so that the warehouse is empty for storing the next run. Assume that the number of tins stored on average during 1 year is half of the number of tins produced in each run. A plant manager must take into account the cost to reset the machine and the cost to store inventory. Although it might otherwise make sense to produce an entire year's inventory of popcorn tins at once, the cost of storing all the tins over a year's time would be prohibitive. Suppose the company needs to produce 1.7 million popcorn tins over the course of a year. The cost to set up the machine for production is $1300, and the cost to store one tin for a year is approximately $1. What size production run will minimize setup and storage costs?
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Assume that s, r, and h are differentiable functions of t. If
, find
when 



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Suppose the flow rate (in cubic feet per second, cfs) of a river in the first 11 hours after the beginning of a severe thunderstorm can be modeled as
cfs where h is the number of hours after the storm began. What are the flow rates for
and
?



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Differentiate the given function with respect to t where r is the radius, and A is the area of the circle. Then, evaluate
with




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The humidity is currently 32% and falling at a rate of 4 percentage points per hour. Estimate the change in humidity over the next 20 minutes.
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