1) Determine the equation of the parabola whose vertex is at origin and whose directrix is y = 3?
y2 = 12x
y2 = -12x
x2 = -12y
x2 = 12y
2) Jeffrey is preparing for the upcoming race. On first day, his lap time was 93 seconds. On second day, his lap time was 82 seconds. On third day, his lap time was 71 seconds, and so on. If his lap time keeps reducing in the similar sequence, determine his lap time on sixth day?
i) 49 seconds
ii) 39 seconds
iii) 30 seconds
iv) 38 seconds
v) 27 seconds