Answer
9.533
Work Step by Step
We are given that $f(x)=1.3x^{2}-2.6x+5.1$.
$f(3.1)=1.3\times3.1^{2}-2.6\times3.1+5.1=1.3\times9.61-8.06+5.1=12.493-8.06+5.1=9.533$
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