Well, this is a broad question but I would say pie. Pie is used very early on in secondary school and therefore a lot of people already know about it and how to use it. But for example if your a banker E would be more important as banks use e to calculate interest.
Hope this helps, have a great day.
-6b > 42 = b<-7
or
4b > -4 = b>-1
Hope this helps.
1 is the model and 24 is the real car and it means the real car is 24 times bigger than the model toy car.
