Chapter 4: Problem 22
In Exercises 21–42, evaluate each expression without using a calculator. $$ \log _{7} 49 $$
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Chapter 4: Problem 22
In Exercises 21–42, evaluate each expression without using a calculator. $$ \log _{7} 49 $$
These are the key concepts you need to understand to accurately answer the question.
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Use the exponential decay model, \(A=A_{0} e^{k t},\) to solve Exercises \(28-31 .\) Round answers to one decimal place. The half-life of aspirin in your bloodstream is 12 hours. How long will it take for the aspirin to decay to \(70 \%\) of the original dosage?
graph each function by making a table of coordinates. If applicable, use a graphing utility to confirm your hand-drawn graph. $$ f(x)=4^{x} $$
In Exercises 81–100, evaluate or simplify each expression without using a calculator. $$ \ln e^{7} $$
Explaining the Concepts Suppose that a population that is growing exponentially increases from \(800,000\) people in 2010 to \(1,000,000\) people in \(2013 .\) Without showing the details, describe how to obtain the exponential growth function that models the data.
Use properties of logarithms to expand each logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator. $$ \log _{b} x^{7} $$
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