Chapter 6: Problem 10
Rewrite the equation in exponential form. (See Example 1.) \(\log _3 \frac{1}{3}=-1\)
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Chapter 6: Problem 10
Rewrite the equation in exponential form. (See Example 1.) \(\log _3 \frac{1}{3}=-1\)
These are the key concepts you need to understand to accurately answer the question.
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PROBLEM SOLVING A study in Florida found that the number \(s\) of fish species in a pool or lake can be modeled by the function $$ s=30.6-20.5 \log A+3.8(\log A)^2 $$ where \(A\) is the area (in square meters) of the pool or lake. a. Use a graphing calculator to graph the function on the domain \(200 \leq A \leq 35,000\). b. Use your graph to estimate the number of species in a lake with an area of 30,000 square meters. c. Use your graph to estimate the area of a lake that contains six species of fish. d. Describe what happens to the number of fish species as the area of a pool or lake increases. Explain why your answer makes sense.
In Exercises 15–22, tell whether the function represents exponential growth or exponential decay. Then graph the function. $$ y=e^{-2 x} $$
CRITICAL THINKING Evaluate each logarithm. (Hint: For each logarithm \(\log _b x\), rewrite \(b\) and \(x\) as powers of the same base.) a. \(\log _{125} 25\) b. \(\log _8 32\) c. \(\log _{27} 81\) d. \(\log _4 128\)
You deposit \(\$ 100\) in an account that pays \(6 \%\) annual interest. How long will it take for the balance to reach \(\$ 1000\) for each frequency of compounding? a. annual b. quarterly c. daily d. continuously
Solve the inequality.\(\ln x \geq 3\)
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