A teacher fills a 5 gallon bucket with water, punches a small hole near the bottom, and asks his students to make measurements as the water drains. Next, the teacher asks the students to fit their data to a quadratic
function of the form h(t) 60 – bt + ct2. The table at the left
represents the students' measurement of the height of the water in the
bucket, in centimeters (cm), t seconds (s) after it begins draining.
Which of the following is most nearly the height expected after 30 s?