###### Exercise 56

The percentage of births in the U.S. delivered via C-section can be given by the following formula for the years since 1996:

\begin{equation*}
p = 0.8(y-1996)+21
\end{equation*}

In this formula \(y\) is a year after 1996 and \(p\) is the percentage of births delivered via C-section for that year.

What percentage of births in the U.S. were delivered via C-section in the year 2012?

of births in the U.S. were delivered via C-section in the year 2012.