Chapter 5: Problem 60
\(-y^2=x^2-36\)
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Chapter 5: Problem 60
\(-y^2=x^2-36\)
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At the start of a dog sled race in Anchorage, Alaska, the temperature was \(5^{\circ} \mathrm{C}\). By the end of the race, the temperature was \(-10^{\circ} \mathrm{C}\). The formula for converting temperatures from degrees Fahrenheit \(F\) to degrees Celsius \(C\) is \(C=\frac{5}{9}(F-32)\). a. Find the inverse function. Describe what it represents. b. Find the Fahrenheit temperatures at the start and end of the race. c. Use a graphing calculator to graph the original function and its inverse. Find the temperature that is the same on both temperature scales.
\(2 x^2+6>13 x\)
MODELING WITH MATHEMATICS The period of a pendulum is the time the pendulum takes to complete one back-and-forth swing. The period \(T\) (in seconds) can be modeled by the function \(T=1.11 \sqrt{\ell}\), where \(\ell\) is the length (in feet) of the pendulum. Graph the function. Estimate the length of a pendulum with a period of 2 seconds. Explain your reasoning.
\(|x+8|=|2 x+2|\)
MODELING WITH MATHEMATICS If you know the speed of sound waves \(v\) (in meters per second) in air, you can approximate the air temperature \(K\) (in kelvin) by using the equation $$ K(v)=\frac{v^2}{402.3} . $$ The function \(C(v)=K(v)-273.15\) approximates the air temperature (in degrees Celsius) when sound waves travel \(v\) meters per second. Write a rule for \(C\). What is the air temperature (in degrees Celsius) when sound waves travel 350 meters per second?
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