T=2
t^2=4
4-4=0
is that right?
The third equation is linear
The decimal that’s equivalent to 28/100 is 0.28
After a thorough search, I found the same question on the internet. Please refer to the attached picture. If it's the same one with yours, then the answer is letter C -
The constant 10 refers to the cost of setting up the food stall even if no cheeseburger was sold.
It is like a fixed cost that is incurred by the food stall that they need to pay for not considering the sales or income they would earn.