Michaela is babysitting little tommy turner who is known to be terror . michaela answered the phone when tommy's parents called to check him leaving timmy unattended for three minutes .during that time tommy turned the oven on its hottest setting and placed his new police car mylar ballon in the oven. what will most likely happen to his ballon

the ballon will explode.

Explanation:

The air in the ballon will increase its temperature and, according to the laws of behavior of the gases, it will expand until it explode.

You can assume ideal gas behavior and  use PV = nRT, where you can see that the volume V and P are proportional to the temperature T, so with the increase in temperature the ballon will increase its volume, until the material of the ballon can not expand more, when the pressure will increase and the material will fail.