The air quality index, or aqi, measures how polluted the air is in your city and assigns a number based on the quality of the air. over 100 is "unhealthy".

the following quadratic regression equation, models the aqi over time, where n represents the number of days the aqi exceeded 100, and t represents the number of years since 1990.

estimate the number of days the aqi exceeded 100 in the year 2002. round to the nearest whole day. (hint: t = 0 corresponds to the year 1990.)

a.
281 days
b.
97 days
c.
135 days
d.
52 days