Answer
a. $f(x)=0.9766x$
b. $f^{-1}(x)=1.02396x$
c. $f^{-1}(12250)=12543.52$,
Work Step by Step
a.
A function that gives the US dollar valuw of $x$ Canadian dollar is,
$f(x)=0.9766x$
b. $y=0.9766x$,
$x=0.9766y$,
$y=\frac{x}{0.9766}=1.02396x=f^{-1}(x)$,
$f^{-1}$ represents a Canadian dollar as a function of of $x$ US dollar value
c.
$f^{-1}(12250)=1.02396(12250)$,
$f^{-1}(12250)=12543.52$,
