# Chapter 1 - Section 1.2 - Algebraic Expressions and Sets of Numbers - Exercise Set: 13

$10,612.80 #### Work Step by Step You are given the following: Cost per hour of operating the aircraft =$2948t$= number of hours$2948t$= total cost to operate the aircraft for$t$hours You are supposed to find the total cost to operate the aircraft for 3.6 hours, so$t=3.6$. Since you already have an expression for the total cost given$t$, just plug in the value for$t$and solve.$2948t=2948\times3.6=10612.80\$ And remember your unit, which in this case is dollars.

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