[3 marks] 3. The Semenov model for the self-heating of a combustible material is de dy - vexp [0) - 0, e (0) - 60, (1) where o is essentially the temperature difference between the combustible material and its surroundings, T is scaled tim, and v 2 0 is known as the Semenov number. A combustible material is assembled with a Semenov number 1 - 0.3. Are there any circumstances under which this stockpile can self-ignite? Note. You may, or may not, need to carefully consider the question of how to round a decimal within the context of an applied mathematics question. This issue has been discussed in lectures. [2 marks]