Im not 100% sure, but I would say that the answer is A. because the magnet must be strong enough to hold the switch in place, and keep the circuit connected
25+50 I assume...I mean I could be wrong but what else would it be
We let C be the cost
x be the number of loaves
cost = overhead cost+ cost to bake - selling price
cost = 90 + 0.60x - 1.50x
cost = 90 - 0.90x
Hope this answers the question. Have a nice day. can you subscribe to my channel its flameboy21 valadez