Chapter 2.1, Problem 59E

Marijuana use For the years since 2001, the percent $p$

Of high school seniors who have tried marijuana can be

Considered as a function of time $t$ according to

$p=f(t)=0.17t^2-2.61t+52.64$

Where $t$ is the number of years past 2000(Source:

National Institute on Drug Abuse). In what year after

2000 is the percent predicted to reach $55\%$ if this function

Remains valid?