$98-$Civ$-$B$8,$ Dec $2009$

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$4.$ Engineering Economics:

A town is considering building a new bridge and two proposals have been put forward. The costs of each proposal are summarized in the following table. With the cost of capital at $9\%,$ which proposal should be adopted $($using present worth$).$

$\backslash$table$[[,$Bridge A$,$Bridge B$],[$Initial cost of bridge,$$6,500,000,$$$5,000,000$