After several days without seeing the course and with a brief review, I reached day 8 and these were my answers to the quiz, which I missed on day 7

In the first spot, with A3s, I would check because the flop is very coordinated, with flush and straight draws that decrease our fold equity, and we have an ace high with a certain showdown value.
On the second spot, with 98o, I would cbet because it should be our default game and the flop is relatively dry, with few draws and we have a gutshot.
After listening to the responses I see that in the first spot I overlooked the fact that I was facing 3 opponents.
See you on day 9!