Find the mass of the one-dimensional object.
A pencil that is 10\displaystyle {10}10 in. long (starting at x=3\displaystyle {x}={3}x=3) and has a density function of ρ(x)=15x\displaystyle \rho{\left({x}\right)}=\frac{{15}}{{x}}ρ(x)=x15 oz/in.
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