/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 29 Supply a valid technol\(\operato... [FREE SOLUTION] | 91Ó°ÊÓ

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Supply a valid technol\(\operatorname{og} y\) formula and then use technology to compute the missing values in the following table: HINT [See Quick Examples on page 633.] $$ \begin{array}{|c|c|c|c|c|c|c|c|} \hline \boldsymbol{x} & -3 & -2 & -1 & 0 & 1 & 2 & 3 \\ \hline \boldsymbol{f}(\boldsymbol{x}) & & & & & & & \\ \hline \end{array} $$ \(r(x)=50\left(1+\frac{1}{3.2}\right)^{2 x}\)

Short Answer

Expert verified
The completed table with missing values for the given function r(x) = 50(1 + \(\frac{1}{3.2}\))^(2x) is: $$ \begin{array}{|c|c|c|c|c|c|c|c|} \hline \boldsymbol{x} & -3 & -2 & -1 & 0 & 1 & 2 & 3 \\ \hline \boldsymbol{f}(\boldsymbol{x}) & 5.06 & 9.85 & 19.14 & 50 & 97.14 & 188.62 & 366.50 \\ \hline \end{array} $$

Step by step solution

01

Understand the given function

The given function is r(x) = 50(1 + \(\frac{1}{3.2}\))^2x. This is an exponential function where the base is (1+ \(\frac{1}{3.2}\)).
02

Substitute the values of x into the function

We will compute f(x) for x = -3, -2, -1, 0, 1, 2, and 3.
03

Calculate the function values

For each value of x, we will plug it into the function r(x) and calculate the corresponding function value. 1. When x = -3: r(-3) = 50(1 + \(\frac{1}{3.2}\))^(2*(-3)) = 50(1.3125)^(-6) ≈ 5.06 2. When x = -2: r(-2) = 50(1 + \(\frac{1}{3.2}\))^(2*(-2)) = 50(1.3125)^(-4) ≈ 9.85 3. When x = -1: r(-1) = 50(1 + \(\frac{1}{3.2}\))^(2*(-1)) = 50(1.3125)^(-2) ≈ 19.14 4. When x = 0: r(0) = 50(1 + \(\frac{1}{3.2}\))^(2*0) = 50(1.3125)^0 = 50 5. When x = 1: r(1) = 50(1 + \(\frac{1}{3.2}\))^(2*1) = 50(1.3125)^2 ≈ 97.14 6. When x = 2: r(2) = 50(1 + \(\frac{1}{3.2}\))^(2*2) = 50(1.3125)^4 ≈ 188.62 7. When x = 3: r(3) = 50(1 + \(\frac{1}{3.2}\))^(2*3) = 50(1.3125)^6 ≈ 366.50
04

Complete the table with the computed values

Now, we will place the computed values of the function for different x values, into the table: $$ \begin{array}{|c|c|c|c|c|c|c|c|} \hline \boldsymbol{x} & -3 & -2 & -1 & 0 & 1 & 2 & 3 \\ \hline \boldsymbol{f}(\boldsymbol{x}) & 5.06 & 9.85 & 19.14 & 50 & 97.14 & 188.62 & 366.50 \\ \hline \end{array} $$

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Technology in Mathematics
The integration of technology into mathematics has revolutionized the way we approach complex computations and conceptual understanding. With the advent of advanced calculators, computer algebra systems, and graphing utilities, evaluating complicated functions like exponential equations has become more efficient and accurate. Students and educators can now visualize mathematical concepts with ease, bringing a new level of depth to learning.

For example, to complete a mathematical table of function values, like in the exercise above, one can simply input the exponential formula into software such as a graphing calculator or an online computation tool. This not only saves time but also reduces the possibility of manual calculation errors. The ability of technology to handle large sets of data and instantaneously plot graphs also allows for a deeper exploration of function behavior over various domains.
Function Evaluation
When it comes to understanding mathematical functions, evaluation is a fundamental skill. Simply put, to evaluate a function is to find its output for a particular input. This is done by substituting the input value into the function's formula. In the context of the given exercise, evaluating the exponential function involves inserting given values of \(x\) into the function's equation and calculating the corresponding value of \(r(x)\).

For each specified \(x\), the operation follows a consistent process: plug the value into the equation, carefully perform the arithmetic operations according to established mathematical rules, and obtain the result. The ease of function evaluation significantly depends on the complexity of the function and the value being substituted, which can range from simple algebra to intricate calculations requiring technology assistance.
Exponential Growth and Decay
Exponential functions, such as \(r(x) = 50(1 + \frac{1}{3.2})^{2x}\), are vital in modeling scenarios that involve rapid increases or decreases, known as exponential growth and decay, respectively. Exponential growth occurs when the rate of increase is proportional to the current amount, leading to the amount increasing at an accelerating rate as time goes on. In contrast, exponential decay depicts a quantity decreasing rapidly at a rate proportional to its value, resulting in a decline that slows down over time.

In our exercise, the base of the exponential, \(1 + \frac{1}{3.2}\), determines the nature of the growth or decay. When the base is greater than one, the function models growth, and when it is between zero and one, it models decay. The effect of \(x\) being positive or negative in the exponent profoundly influences the direction of change: positive exponents indicate growth, while negative exponents signal decay. This concept illustrates how exponential functions can represent a wide array of real-world phenomena such as population growth, radioactive decay, and interest compounding.
Mathematical Tables
Mathematical tables, such as those used to chart values of functions, have historically been essential tools in mathematics and sciences. They provide a clear and organized way to visualize how a function behaves for different inputs. Before the widespread use of technology, practitioners relied on printed logarithmic tables and trigonometric tables to simplify calculations. With modern advances, creating such tables can be quickly done with computer programs.

The table in the exercise efficiently summarizes the computed values of the exponential function at various points. By looking at the table, one can easily discern the trend of the values and get an intuitive understanding of the function's exponential growth or decay. This not only aids in learning and understanding but also in predicting and extrapolating the behavior of exponential functions across different contexts. Such tables are invaluable in STEM fields, finance, and any discipline that relies on quantitative analysis.

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Most popular questions from this chapter

Use technology to find a logistic regression curve \(y=\frac{N}{1+A b^{-x}}\) approximating the given data. Draw a graph showing the data points and regression curve. (Roumd \(b\) to three significant digits and \(A\) and \(N\) to two significant digits.) $$ \begin{array}{|l|c|c|c|c|c|c|} \hline \boldsymbol{x} & 0 & 30 & 60 & 90 & 120 & 150 \\ \hline \boldsymbol{y} & 2.8 & 5.8 & 7.9 & 9.4 & 9.7 & 9.9 \\ \hline \end{array} $$

Find the associated exponential decay or growth model. $$ Q=2,000 \text { when } t=0 ; \text { half-life }=5 $$

New York \mathrm{\\{} C i t y ~ H o u s i n g ~ C o s t s : ~ D o w n t o w n ~ T h e ~ f o l l o w i n g ~ table shows the average price of a two-bedroom apartment in downtown New York City during the real estate boom from 1994 to \(2004 .^{24}\) $$ \begin{array}{|c|c|c|c|c|c|c|} \hline \boldsymbol{t} & 0(1994) & 2 & 4 & 6 & 8 & 10(2004) \\ \hline \begin{array}{r} \text { Price } \\ \text { (S million) } \end{array} & 0.38 & 0.40 & 0.60 & 0.95 & 1.20 & 1.60 \\ \hline \end{array} $$ a. Use exponential regression to model the price \(P(t)\) as a function of time \(t\) since 1994 . Include a sketch of the points and the regression curve. (Round the coefficients to 3 decimal places.) HINT [See Example 6.] b. Extrapolate your model to estimate the cost of a twobedroom downtown apartment in 2005 .

Sales In Russia the average consumer drank two servings of Coca-Cola in 1993. This amount appeared to be increasing exponentially with a doubling time of 2 years. \({ }^{43}\) Given a long-range market saturation estimate of 100 servings per year, find a logistic model for the consumption of Coca-Cola in Russia and use your model to predict when, to the nearest year, the average consumption will be 50 servings per year.

How long, to the nearest year, will it take an investment to triple if it is continuously compounded at \(10 \%\) per year? HINT [See Example 3.]

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