the answer is the option </span><span>B: 8a3 + 6a2 − 7a + 3
</span><span>Question 3: A company distributes its product by train and by truck. The cost of distributing by train can be modeled as −0.06x2 + 35x − 135, and the cost of distributing by truck can be modeled as −0.03x2 + 29x − 165, where x is the number of tons of product distributed. Write a polynomial that represents the difference between the cost of distributing by train and the cost of distributing by truck.
we have that [</span>the cost of distributing by train]-[the cost of distributing by truck] =[−0.06x2 + 35x − 135]-[−0.03x2 + 29x − 165] <span>=(-0.06x2+0.03x2)+(35x-29x)+(-135+165) =-0.03x2+6x+30
the answer is the option </span><span>C: −0.03x2 + 6x + 30 </span><span>
