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Write each equation in its equivalent exponential form. $$\log _{5} 125=y$$

Short Answer

Expert verified
The exponential form of the equation \(\log _{5} 125=y\) is \(5^y = 125\).

Step by step solution

01

Understand the formula for conversion

The given equation is in log form. The general formula to convert a log equation \(\log _{b} a = c\) into its exponential form is \(b^c=a\). This formula shows the relationship between log and exponential forms.
02

Identify the base, exponent, and result

In our given equation, \(\log _{5} 125=y\), 5 is the base \(b\), y is the exponent \(c\), and 125 is the result \(a\).
03

Substitute into the formula

Substitute these values into the conversion formula to get the exponential form. That is, the base 5 raised to the power of y (\(c\)) equals 125 (\(a\)).

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Key Concepts

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

Logarithms
Logarithms are mathematical tools that help us find the power to which a given number, known as the base, must be raised to obtain another number. In essence, a logarithm answers the question, "To what exponent must I raise my base to get a particular number?"
For example, in the equation \(\log_{5} 125=y\), the logarithm \(\log_{5}\) is solving for \(y\), which is the power or exponent needed to make the base 5 equal to 125.
Logarithms are widely used in fields such as computer science, biology, and engineering due to their ability to simplify complex multiplication and division into simpler addition and subtraction. Understanding logarithms is crucial for converting them into their exponential counterparts.
Exponents
Exponents are essentially shorthand for repeated multiplication. When we use exponents, we're talking about how many times we multiply a number (the base) by itself.
Consider the expression \(5^3\). This means that the number 5 is being multiplied by itself three times: \(5 \times 5 \times 5 = 125\).
In the context of logarithmic conversion, exponents work in the reverse direction. Given a logarithmic expression like \(\log_{5} 125 = y\), the exponent (or \(y\)) tells us the power to which the base 5 must be raised to result in 125. Understanding exponents is a key component of mastering logarithmic to exponential conversions.
  • Exponents represent repeated multiplication.
  • Used to express how many times a base is multiplied by itself.
  • In log conversions, the exponent is what we often solve for.
Base of Logarithm
In any logarithmic expression, the base of the logarithm is the number that is raised to a power to produce another number. It is a critical part of understanding how logarithms and exponents relate to each other.
Let's use the equation \(\log_{5} 125 = y\) as an example. Here, the base of the logarithm is 5.
When we convert this logarithm into an exponential form, the base remains the same. It becomes the base in the exponential expression. So, when rewritten exponentially, it tells us that 5 raised to the power of \(y\) gives us 125.
Always remember, in logarithmic and exponential forms, the base is the foundation on which calculations or reasonings are built. Keeping track of what the base is will help prevent confusion and errors.
Exponential Form
The exponential form is a way of writing numbers that involves exponents, showing how many times a base is used in a multiplication. The conversion from logarithmic to exponential form is central to understanding logarithmic functions effectively.
For example, translating \(\log_{5} 125 = y\) to exponential form results in \(5^y = 125\). This expression tells us that 5 (the base) is multiplied by itself \(y\) times to produce 125.
The power of exponential form is in its simplicity and clarity. When numbers grow rapidly, exponential expressions provide a compact and easy-to-comprehend method of representation. It also helps solve for unknown values such as \(y\) in our example by equating similar exponential expressions. Understanding how to go back and forth between logarithmic and exponential forms is vital in math and various applications, such as calculating interest in finance or estimating population growth in biology.
  • Shows repeated multiplication with a base number.
  • Used to convert logarithmic expressions into a more workable form.
  • Crucial for understanding growth patterns and equations.

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Most popular questions from this chapter

Exercises \(153-155\) will help you prepare for the material covered in the next section. U.S. soldiers fight Russian troops who have invaded New York City. Incoming missiles from Russian submarines and warships ravage the Manhattan skyline. It's just another scenario for the multi-billion-dollar video games Call of Duty, which have sold more than 100 million games since the franchise's birth in 2003 The table shows the annual retail sales for Call of Duty video games from 2004 through 2010 . Create a scatter plot for the data. Based on the shape of the scatter plot, would a logarithmic function, an exponential function, or a linear function be the best choice for modeling the data? $$\begin{array}{cc} \hline \text { Year } & \begin{array}{c} \text { Retail Sales } \\ \text { (millions of dollars) } \end{array} \\ \hline 2004 & 56 \\ 2005 & 101 \\ 2006 & 196 \\ 2007 & 352 \\ 2008 & 436 \\ 2009 & 778 \\ 2010 & 980 \end{array}$$

a. Evaluate: \(\log _{2} 16\) b. Evaluate: \(\log _{2} 32-\log _{2} 2\) c. What can you conclude about \(\log _{2} 16,\) or \(\log _{2}\left(\frac{32}{2}\right) ?\)

The exponential growth models describe the population of the indicated country, \(A\), in millions, \(t\) years after 2006 $$\begin{array{l}\mathrm{Camada}\quadA=33.1e^{0.009\mathrm{t}}\\\\\mathrm{U}_{\mathrm{ganda}}\quad A=28.2 e^{0.034 t}\end{array}$$ In Exercises \(81-84,\) use this information to determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. By \(2009,\) the models indicate that Canada's population will exceed Uganda's by approximately 2.8 million.

You have \(\$ 10,000\) to invest. One bank pays \(5 \%\) interest compounded quarterly and a second bank pays \(4.5 \%\) interest compounded monthly. a. Use the formula for compound interest to write a function for the balance in each bank at any time \(t\) b. Use a graphing utility to graph both functions in an appropriate viewing rectangle. Based on the graphs, which bank offers the better return on your money?

Determine whether each statement makes sense or does not make sense, and explain your reasoning. I estimate that \(\log _{8} 16\) lies between 1 and 2 because \(8^{1}=8\) and \(8^{2}=64\).

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