Hank's and Bill's houses are 1 and 3 miles from their school, respectively. Each boy
left his house on a bicycle at the same time
and rode for 30 minutes. The graph above
shows the distance, in miles, each boy was
from the school during their rides. Based
on this information, which of the following
statements, if any, is not necessarily true?
(A) Hank is riding faster than Bill for the
entire 30 minutes.
(B) The distance that Hank rode is greater
than the distance that Bill rode.
(C) Hank and Bill's paths cross exactly once
during their 30-minute rides.
(D) Each of the above statements must be
true.

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.