You get into an elevator at around 8 am carrying a box with 5 x liters of volume. The temperature inside is about 90 ° F. The elevator has the following dimensions 2m wide, 3m high and 3m long. Seconds after you get on the elevator it stops and at that moment the air inside is limited to the size of the elevator. You send a message asking for help, which will arrive soon. Estimate the time you still have inside the elevator. Consider that you breathe about 100mL of oxygen every 2 seconds and that 21% of the air is oxygen. Consider that x = 29