A trampolinist steps off from 23 feet above ground to a trampoline 15 feet below. The function
h(t)=-1672 +23, where t represents the time in seconds, gives the height, in feet, of the trampolinist
above the ground as he falls. When will the trampolinist land on the trampoline?
The trampolinist will land on the trampoline after about
second(s).

First, we list the data in increasing order: 8, 14, 20, 28, 29, 30, 31, 32, 35, 36, 42. We can see that the median or the value at the midpoint of the data set is 30. Next, we divide it into the lower quartile: 8, 14, 20, 28, 29 and the upper quartile: 31, 32, 35, 36, 42. The lower extreme refers to the lowest number in the data set which is 8 while the upper extreme refers to the highest number which is 42. The lower quartile is considered to be the median of the lower half of the data set. In this case, it is 20. On the other hand, the upper quartile has a similar definition which then gives 35 as the upper quartile. Thus, the answer is choice C.