b. When operating heavy machinery, one must use caution.
c. Upon bestowing the awards, the mayor congratulated all the participants.
d. Upon hearing the fire engines, the apartment building was evacuated.
In the question, we are told that, homeroom 101 and homeroom 102 share a bulletin board; this implies that each one of them have right to 1/2 of the bulletin board.
If homeroom 101 uses 3/5 of their half portion, then the calculation will be:
3/5 * 1/2 = 3/10.
Thus, the homeroom 101 uses 3/10 of the bulletin board to display their artwork.
Answer:
A modern connection to real life is when someone sees something they like that you have but they're not suppose to have it they're going to want to take it.
Explanation:
But the desire to have something is greater when your not suppose take or have it.