Review

A rectangular cross section tie $($component that supports a tensile load$)$ is loaded with a $35$ kN force. The cross section of the tie is $\backslash (30\backslash$mathrm$\{$~mm$\}\backslash$times $10\backslash$mathrm$\{$~mm$\}\backslash ).$ The tie is $1\mathrm{.}3$ m long and elongates by $0\mathrm{.}72$ mm $.$ Determine the engineering strain experienced by this tie while under load. Express your final answer with two significant figures and in scientific notation in the format of this example: to write $\backslash (3\mathrm{.}3\backslash$times $10^\{-8\}\backslash ),$ please write $\backslash (3\mathrm{.}3\backslash$mathrm$\{$e$\}-8\backslash )$

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