Answer:
Once
Step-by-step explanation:
Whenever v(t) crosses the x axis. Not just bounce off it.
From the least to the greatest.
The one with the biggest size and has a negative sign is the least
-5216, -3.2, -3.12, 8
You add +7 to both sides and then divide by 9 to get the x alone.
Step-by-step explanation:

You want to isolate x. To accomplish this, add 1.4 to both sides of your eqn.:
x = 7.82 + 1.4 = 9.22 (answer)