Chapter 8: Problem 33
Expand each expression using the properties of logarithms. \(\log _{10}(x+1)^{2}\)
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Chapter 8: Problem 33
Expand each expression using the properties of logarithms. \(\log _{10}(x+1)^{2}\)
These are the key concepts you need to understand to accurately answer the question.
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The decay constant of francium is \(-0.0315\) minutes. a. After how many minutes will 1.25 grams of francium remain of a 10.0 -gram sample? Assume the exponential decay occurs continuously. b. What is the half-life of francium? (The half-life of an element is the length of time needed for half of a sample to decay. For example, it is the length of time for a sample of 10 grams to be reduced to 5 grams of the original element.)
In \(15-23,\) evaluate each logarithm to the nearest hundredth. $$ \log 80 $$
The formula \(t=\frac{\log K}{0.045 \log e}\) gives the time \(t\) (in years) that it will take an investment \(P\) that is compounded continuously at a rate of 4.5\(\%\) to increase to an amount \(K\) times the original principal. a. Use the formula to complete the table to three decimal places. $$ \begin{array}{|c|c|c|c|c|c|c|c|}\hline K & {1} & {2} & {3} & {4} & {5} & {10} & {20} & {30} \\ \hline t & {} & {} & {} & {} & {} & {} \\ \hline\end{array} $$ b. Use the table to graph the function \(t=\frac{\log K}{0.045 \log e}\) c. If Paul invests \(\$ 1,000\) in a savings account that is compounded continuously at a rate of \(4.5 \%,\) when will his investment double? triple?
In \(27-56,\) evaluate each logarithmic expression. Show all work. $$ \frac{\log _{5} 25+2 \log _{10} 10}{\log _{16} 4} $$
In \(11-22,\) solve each equation for \(y\) in terms of \(x\) $$ x=\log _{8} y $$
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