Chapter 7: Problem 15
In Exercises \(1-21,\) solve the equation for the variable. $$ 2 p^{5}+64=0 $$
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Chapter 7: Problem 15
In Exercises \(1-21,\) solve the equation for the variable. $$ 2 p^{5}+64=0 $$
These are the key concepts you need to understand to accurately answer the question.
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A quantity \(P\) is inversely proportional to the cube of a quantity \(R\). Solve for \(R\) in terms of \(P\). Is \(R\) inversely proportional or proportional to a positive power of \(P ?\) What power?
In Exercises \(13-16,\) what happens to \(y\) when \(x\) is doubled? Here \(k\) is a positive constant. $$ y=k x^{3} $$
If the side length of a cube is increased by \(10 \%,\) what happens to its volume?
Poiseuille's Law tells us that the rate of flow, \(R,\) of a gas through a cylindrical pipe is proportional to the fourth power of the radius, \(r\), of the pipe, given a fixed drop in pressure between the two ends of the pipe. For a certain gas, if the rate of flow is measured in \(\mathrm{cm}^{3} / \mathrm{sec}\) and the radius is measured in \(\mathrm{cm}\), the constant of proportionality is 4.94 . (a) If the rate of flow of this gas through a pipe is 500 \(\mathrm{cm}^{3} / \mathrm{sec},\) what is the radius of the pipe? (b) Solve for the radius \(r\) in terms of the rate of flow \(R\). (c) Is \(r\) proportional to a power of \(R ?\) If so, what power?
In Exercises \(43-48\), what operation transforms the first equation into the second? Identify any extraneous solutions and any solutions that are lost in the transformation. $$ \begin{array}{r} t+1=1 \\ (t+1)^{2}=1 \end{array} $$
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