If T(h) is the temperature in the atmosphere as a function of height of a weather balloon and h(t) is the height of a weather balloon as a function of time, then _ is the temperature at the location of the weather balloon as a function of time.

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school. each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220