Answer:
C
Step-by-step explanation:
A has nothing to do with the paper inside and B and D don't matter bc its the first student
H(t) = 0 for t = 7 and for t = -2.
It is reasonable for the time to be positive, 7 seconds.
(The offered answers all appear to be negative, so none are reasonable.)
5.30 because 3 is smaller than 30
T=34xP
T= tip for him
P= percent he charges for tip